CN109312119A

CN109312119A - The preparation method of rubber composition, tire and rubber composition

Info

Publication number: CN109312119A
Application number: CN201780034492.8A
Authority: CN
Inventors: 出云优
Original assignee: Sumitomo Rubber Industries Ltd
Current assignee: Sumitomo Rubber Industries Ltd
Priority date: 2016-06-02
Filing date: 2017-05-22
Publication date: 2019-02-05
Also published as: EP3450492A1; WO2017208891A1; EP3450492A4; US20210221981A1

Abstract

Rubber composition according to the present invention, it includes feed chemicals, the feed chemicals include the rubber components containing SBR styrene butadiene rubbers, the filler containing silica, silane coupling agent and organo-aluminum compound, the tire tread and tire that can be provided the rubber composition for tire of a kind of wet grip performance with enhancing and wearability and the fuel economy of enhancing and be produced using the rubber composition.

Description

The preparation method of rubber composition, tire and rubber composition

Technical field

It is produced the present invention relates to a kind of rubber composition (especially rubber composition for tire), using the rubber composition Tire tread and tire and rubber composition preparation method (the especially preparation method of rubber composition for tire).

Background technique

Tire includes various components, such as tyre surface and liner layer, and each component is endowed various performances.From safety Deng angle set out, it is desirable that the tyre surface contacted with road surface has wet grip performance etc., and proposes by adding aluminium hydroxide To improve the method (patent document 1) of the performance.

However, there are problems that breaking strength reduces and wearability deteriorates, therefore need in the case where adding aluminium hydroxide It is further improved.

Existing technical literature

Patent document

Patent document 1:JP 2002-338750 A

Summary of the invention

Problems to be solved by the invention

The object of the present invention is to provide: (1) rubber composition (especially have enhancing wet grip performance and wearability with And the rubber composition for tire of the fuel economy improved) and the tire tread and wheel that are produced using the rubber composition Tire, and the preparation method of (2) rubber composition (especially have the wet grip performance enhanced and wearability and the fuel of raising The preparation method of the rubber composition for tire of economy).

The means solved the problems, such as

To solve the above-mentioned problems, the present inventor has made intensive studies, as a result, it has been found that: by that will include dioxy The filler and silane coupling agent of SiClx are mixed into scheduled rubber components, and further mix scheduled organo-aluminum compound generation For aluminium hydroxide, (1) can solve the above problem, and the present inventor further studies, so as to complete the present invention.In addition, The present inventors have additionally discovered that: it will wrap silica containing filler and silane coupling agent is mixed into scheduled rubber components and mixes In the case that scheduled organo-aluminum compound replaces aluminium hydroxide, by will pinch in the discharge in the first half stage of kneading step Object is closed to keep at high temperature, can solve the above problem (2).In addition, the present inventors have additionally discovered that: silica containing fill out will wrapped Material and silane coupling agent are mixed into scheduled rubber components and mix the feelings that scheduled organo-aluminum compound replaces aluminium hydroxide Under condition, promoted by mixing the alkalinity vulcanization usually mixed in the rear half stage of kneading step in the first half stage of kneading step Agent can solve the above problem (2), and the present inventor is further studied it, therefore completes the present invention.

That is, this disclosure relates to:

[1] a kind of rubber composition, it includes feed chemicals, the feed chemicals include to contain styrene-butadiene rubber The rubber components of glue, the filler containing silica, silane coupling agent and organo-aluminum compound,

[2] rubber composition according to above-mentioned [1], wherein the silane coupling agent is the silane coupling agent with sulfydryl, And the silane coupling agent, which is selected from, includes the connection unit A indicated by lower formula (I) and the connection unit B indicated by lower formula (II) Silane coupling agent and at least one of the silane coupling agent that is indicated by lower formula (III),

In formula,

X is 0 or more integer, and y is 1 or more integer.

R¹Indicate hydrogen, halogen, branch or the unbranched alkyl with 1~30 carbon atom, branch or it is unbranched with 2~ Alkenyl, branch or the unbranched alkynyl with 2~30 carbon atoms of 30 carbon atoms or the end hydrogen of the alkyl are by hydroxyl Or the alkyl that carboxyl replaces.R²Indicate branch or the unbranched alkylidene with 1~30 carbon atom, branch or unbranched Alkenylene or branch or the unbranched alkynylene with 2~30 carbon atoms with 2~30 carbon atoms.R¹And R²It can shape At (being formed with or without) cyclic structure.

In formula,

R¹⁰⁰¹For selected from-Cl ,-Br ,-OR¹⁰⁰⁶,-O (O=) CR¹⁰⁰⁶,-ON=CR¹⁰⁰⁶R¹⁰⁰⁷,-ON=CR¹⁰⁰⁶R¹⁰⁰⁷、- NR¹⁰⁰⁶R¹⁰⁰⁷(OSiR¹⁰⁰⁶R¹⁰⁰⁷)_h(OSiR¹⁰⁰⁶R¹⁰⁰⁷R¹⁰⁰⁸) univalent perssad (R¹⁰⁰⁶、R¹⁰⁰⁷And R¹⁰⁰⁸It may be the same or different, Each is hydrogen atom or the monovalent hydrocarbon with 1~18 carbon atom, and the average value of h is 1~4).

R¹⁰⁰²For R¹⁰⁰¹, hydrogen atom or the monovalent hydrocarbon with 1~18 carbon atom.

R¹⁰⁰³For R¹⁰⁰¹、R¹⁰⁰², hydrogen atom or [O (R¹⁰⁰⁹O)_j]_0.5Group (R¹⁰⁰⁹For the alkylidene with 1~18 carbon atom, The integer that j is 1~4).

R¹⁰⁰⁴For the bivalent hydrocarbon radical with 1~18 carbon atom.

R¹⁰⁰⁵For the monovalent hydrocarbon with 1~18 carbon atom.

X, y and z is to meet relationship x+y+2z=3,0≤x≤3,0≤y≤2 and the number of 0≤z≤1,

[3] rubber composition according to above-mentioned [1], wherein the CTAB specific surface area of silica is 100m²/ g or more, It is preferred that 165m²/ g or more, more preferable 170m²/ g or more, and silica is 110m according to the BET specific surface area of N2 adsorption²/g More than, preferably 175m²/ g or more, more preferable 180m²/ g or more,

[4] rubber composition according to above-mentioned [3], wherein the CTAB specific surface area of silica is 180~600m²/ g, It is preferred that 190~300m²/ g, more preferable 195~300m²/ g, further preferred 195~250m²/ g, further preferred 197~ 250m²/ g, and silica is 185~600m according to the BET specific surface area of N2 adsorption²/ g, preferably 190~300m²/ g, more It is preferred that 195~300m²/ g, further preferred 200~300m²/ g, further preferred 200~260m²/ g, further preferred 210~ 260m²/ g,

[5] rubber composition according to any one of above-mentioned [1]~[4], wherein filler also includes carbon black,

[6] rubber composition according to above-mentioned [5], wherein relative to the rubber components of 100 mass parts, silica Combined amount is 50~150 mass parts, preferably 60~120 mass parts, more preferable 60~110 mass parts, the combined amount of carbon black is 5~ 50 mass parts, preferably 5~35 mass parts, more preferable 5~20 mass parts, further preferred 8~20 mass parts and organic calorize Close object combined amount be 5~45 mass parts, preferably 5~40 mass parts, more preferable 7~40 mass parts, further preferred 10~40 Mass parts；Relative to the silica of 100 mass parts, the combined amount of silane coupling agent is 1~20 mass parts, preferably 1.5~20 Mass parts, more preferable 2~20 mass parts, further preferred 5~20 mass parts, further preferred 5~15 mass parts are further excellent 7~12 mass parts are selected,

[7] rubber composition according to any one of above-mentioned [1]~[6], wherein organo-aluminum compound is shown in formula (1) Aluminium alcoholates (aluminum alcolate):

Al(OR^a)(OR^b)(OR^c)₃ (1)

In formula, R^a、R^bAnd R^cSeparately indicate aliphatic alkyl,

[8] a kind of tire tread is made using rubber composition described in any one of above-mentioned [1]~[7],

[9] a kind of tire, with tire tread described in above-mentioned [8],

[10] a kind of preparation method of rubber composition, the rubber composition include feed chemicals, the feed chemicals Include the rubber components containing SBR styrene butadiene rubbers, the filler containing silica, silane coupling agent and organo-aluminium chemical combination Object, which comprises

Kneading step, the kneading step included at least two stages, and at least two stage includes mediating not Containing Sulfur Sulfur vulcanization chemistries product are added in the first half stage of the feed chemicals of product and the kneaded material obtained to the first half stage and mediate mixing The rear half stage of object,

Wherein, in the first half stage, the discharge temperature of kneaded material is the temperature within the scope of predetermined temperature, and by kneaded material Predetermined period of time is kept under the discharge temperature, to remove the alcohol generated in kneading process, and

[11] a kind of preparation method of rubber composition, the rubber composition include feed chemicals, the feed chemicals Include the rubber components containing SBR styrene butadiene rubbers, the filler containing silica, silane coupling agent and organo-aluminium chemical combination Object, the method includes kneading step,

The kneading step included at least two stages, and at least two stage includes mediating the raw material chemistry without vulcanizing agent The rear half stage of vulcanizing agent and kneaded mixture is added in the first half stage of product and the kneaded material obtained to the first half stage,

Wherein, the first half stage is that alkaline vulcanization accelerator is added to comprising rubber components, filler, silane coupling agent and organo-aluminium In the feed chemicals of compound and kneaded mixture stage.

Invention effect

According to the present invention it is possible to which providing the rubber composition with excellent various characteristics (especially has the wet of improvement The rubber composition for tire of grip performance and wearability and improved fuel economy), produced using the rubber composition Tire tread and the preparation method of tire and the rubber composition with excellent various characteristics (especially having improves The preparation method of the rubber composition for tire of wet grip performance and wearability and improved fuel economy).

Specific embodiment

In the present invention, enumerate first embodiment to the 5th embodiment for example, below will be described.

< first embodiment >

First embodiment is related to:

[1] a kind of rubber composition, it includes feed chemicals, the feed chemicals include to contain styrene-butadiene rubber The rubber components (A-1) of glue, filler, silane coupling agent (C-1) and the organo-aluminum compound (D- for containing silica (B1-1) 1),

[2] rubber composition according to above-mentioned [1], wherein filler also includes carbon black (B2-1),

[3] rubber composition according to above-mentioned [2], wherein relative to the rubber components (A-1) of 100 mass parts, titanium dioxide The combined amount of silicon (B1-1) is 50~150 mass parts, preferably 60~120 mass parts, more preferable 60~110 mass parts, carbon black (B2-1) combined amount be 5~50 mass parts, preferably 5~35 mass parts, more preferable 5~20 mass parts, further preferred 8~20 Mass parts, and the combined amount of organo-aluminum compound (D-1) be 5~45 mass parts, preferably 5~40 mass parts, more preferable 7~40 Mass parts, further preferred 10~40 mass parts；Relative to the silica (B1-1) of 100 mass parts, silane coupling agent (C-1) Combined amount be 1~20 mass parts, preferably 1.5~20 mass parts, more preferable 2~20 mass parts, further preferred 5~20 mass Part, further preferred 5~15 mass parts, further preferred 7~12 mass parts,

[4] rubber composition according to any one of above-mentioned [1]~[3], wherein organo-aluminum compound (D-1) is formula (1) Shown in aluminium alcoholates (aluminum alcolate):

Al(OR^a)(OR^b)(OR^c)₃ (1)

In formula, R^a、R^bAnd R^cSeparately indicate aliphatic alkyl,

[5] a kind of tire tread is made using rubber composition described in any one of above-mentioned [1]~[4],

[6] a kind of tire, with tire tread described in above-mentioned [5],

According to first embodiment, can provide the rubber composition with excellent various characteristics (especially has and changes The rubber composition for tire of kind wet grip performance and wearability and improved fuel economy) and use the rubber group Close the tire tread and tire of object production.

The mode for implementing first embodiment is described below.

< rubber components (A-1) >

Rubber components (A-1) include SBR styrene butadiene rubbers (SBR).SBR is not particularly limited, and it is, for example, possible to use lotions The SBR styrene butadiene rubbers (E-SBR) of polymerization, the SBR styrene butadiene rubbers (S-SBR) of polymerisation in solution, their modification SBR styrene butadiene rubbers (modified S-SBR, modified E-SBR) etc..The example of modified SBR includes terminal-modified and/or main chain Modified SBR, the modification SBR being coupled with tin compound or silicon compound etc. are (for example, condensation product, have branched structure Modification SBR etc.).

From the perspective of sufficient wet grip performance and dry grip performance, the contents of ethylene of SBR is preferably not less than 20 Mole %, more preferably no less than 25 moles of %.On the other hand, from the perspective of good wearability, contents of ethylene is preferred No more than 80 moles %, more preferably no more than 70 moles of %.It should be noted that the contents of ethylene of SBR is to pass through infrared absorption spectrum The value that analysis method determines.

From the perspective of sufficient wet grip performance and dry grip performance, the styrene-content of SBR is preferably not less than 20 Quality %, more preferably no less than 25 mass %.On the other hand, (become from good wearability and temperature dependency relative to temperature The repressed state of the performance change of change) from the perspective of, styrene-content is preferably more than 60 mass %, more preferably no more than 50 mass % are further preferably no more than 45 mass %.

From the perspective of good wet grip performance and dry grip performance, the glass transition temperature (Tg) of SBR is preferred Not less than -60 DEG C, more desirably not less than -50 DEG C.From the perspective of good initial stage grip performance and wearability, Tg is preferably not Higher than 0 DEG C, more preferably no higher than -10 DEG C.

From the angle of sufficient heat resistance and wearability, relative to the rubber components (A-1) of 100 mass %, SBR's Content is not less than 60 mass %, preferably not less than 70 mass %, more desirably not less than 80 mass %, more desirably not less than 90 matter Measure %, most preferably 100 mass %.

Other rubber components in addition to SBR can be mixed as rubber components (A-1).The example of this other rubber components It include: diene series rubber, such as natural rubber (NR), butadiene rubber (BR), isoprene rubber (IR), styrene-isoamyl two Alkene-butadiene rubber (SIBR), neoprene (CR) and acrylonitrile-butadiene rubber (NBR)；Non- diene series rubber, such as ethylene- Propylenediene rubber (EPDM), butyl rubber (IIR) and halogenated butyl rubber (X-IIR)；Deng.These other rubber components can Particular types are used alone, also can be used in combination, its is two or more.

< filler >

Filler includes silica (B1-1).This is because can expect to improve wet grab when filler includes silica (B1-1) Ground performance and fuel economy.It is, for example, possible to use prepared by the silica of dry process (anhydride silica), wet process two Silica (aqueous silicon dioxide) etc. is used as silica (B1-1).Particularly, the silica of wet process preparation is because of silanol The quantity of base it is more and it is preferred that.

The angle that the wearability generated improves, silica are improved and improved by reinforcing property from fuel economy (B1-1) N2 adsorption BET specific surface area (N₂SA) it is preferably not less than 50m²/ g, more preferably no less than 70m²/ g is not more preferably small In 100m²/ g, more preferably no less than 120m²/ g is further preferably not less than 150m²/g.On the other hand, from ensuring good point From the perspective of dissipating property and inhibiting agglutination, the N of silica (B1-1)₂SA is preferably no greater than 500m²/ g, preferably no greater than 400m²/ g, more preferably no more than 300m²/g。

The N of silica (B1-1)₂SA is the value measured according to ASTM D3037-81 by BET method.

Silica (B1-1) can be used alone particular types, or can be used in combination that its is two or more.

Unless the purpose with first embodiment contradicts, otherwise any filler common in the art can be appropriate Ground is used as the filler in addition to silica (B1-1), and the example of this filler includes carbon black (B2-1).By mixing charcoal Black (B2-1), can expect the improvement of wearability.Preferably comprise the filler of silica (B1-1) and carbon black (B2-1).

As carbon black (B2-1), for example, having the carbon black etc. produced by Audit For Process, and it is two or more to can be used in combination Carbon black with different colloidal natures.Its example include those of GPF, HAF, ISAF, SAF grade carbon black and it is all so Class.

For the reasons why can obtaining good wet grip performance, dry grip performance and wearability, the nitrogen of carbon black (B2-1) Adsorption specific surface area (N₂It SA) is preferably 70~250m²/ g, more preferably 110~200m²/g.For the same reason, carbon black (B2-1) dibutyl phthalate oil absorption (DBP) is preferably 50~250ml/100g.It should be noted that carbon black (B2-1) N₂SA is the value measured according to JIS K6217-2:2001, and DPB is the value measured according to JIS K6217-4:2001.

Carbon black (B2-1) can be used alone particular types, or can be used in combination that its is two or more.

From the perspective of sufficient wet grip performance, relative to the rubber components (A-1) of 100 mass parts, silica (B1-1) combined amount is not less than 50 mass parts, more preferably no less than 60 mass parts.On the other hand, from its it is good dispersibility with And further from the perspective of good wearability, which is not more than 150 mass parts, preferably no greater than 120 mass parts, more Preferably no greater than 110 mass parts.

From the perspective of good wet grip performance, dry grip performance and wearability, at mixed carbon black (B2-1), phase For the rubber components (A-1) of 100 mass parts, combined amount is preferably not less than 5 mass parts, more preferably no less than 8 mass parts.Separately On the one hand, from the perspective of keeping good wet grip performance, combined amount is preferably no greater than 50 mass parts, more preferably no more than 35 mass parts are further preferably not more than 20 mass parts.

Rubber from the perspective of good wet grip performance, dry grip performance and wearability, relative to 100 mass parts Component (A-1), the combined amount of filler are preferably not less than 50 mass parts, preferably not less than 55 mass parts, more preferably no less than 65 matter Measure part.On the other hand, from the perspective of good wet grip performance and wearability, combined amount is not more than 170 mass parts, more excellent Choosing is not more than 150 mass parts, is further preferably not more than 120 mass parts.From the effect for satisfactorily showing first embodiment From the perspective of fruit, silica (B1-1) ratio shared in whole fillers is preferably not less than 70 mass %, more preferably not Less than 75 mass %, more preferably no less than 80 mass %.On the other hand, based on reason same as described above, which is not more than 95 mass %, more preferably no more than 90 mass %.

When filler is made of silica (B1-1) and carbon black (B2-1), the combined amount of carbon black (B2-1) " can be filled out by above-mentioned The total amount of material " and " combined amount of silica (B1-1) " determine, alternatively, the combined amount of silica (B1-1) can be by above-mentioned " total amount of filler " and " combined amount of carbon black (B2-1) " determines.

< silane coupling agent (C-1) >

Silane coupling agent (C-1) is not particularly limited, and any silane coupling agent commonly used in the art can be suitably used.It is this The example of silane coupling agent (C-1) is: bis- (3- triethoxysilylpropyltetrasulfide) polysulfides, bis- (2- triethoxy first silicon Alkyl ethyl) polysulfide, bis- (3- trimethoxy-silylpropyl) polysulfides, bis- (2- trimethoxysilyl second Base) polysulfide, bis- (4- triethoxysilyl butyl) polysulfides, bis- (4- trimethoxysilyl butyl) more sulphur Compound etc..Wherein, preferably bis- (3- triethoxysilylpropyltetrasulfide) polysulfides and bis- (2- triethoxysilyl second Base) polysulfide, more preferable bis- (3- triethoxysilylpropyltetrasulfide) tetrasulfides and bis- (2- triethoxysilyl second Base) tetrasulfide.

From the angle of good wearability, relative to the silica (B1-1) of 100 mass parts, silane coupling agent (C-1) combined amount is preferably not less than 1 mass parts, more preferably no less than 1.5 mass parts, more preferably no less than 2 mass parts, preferably Not less than 5 mass parts, more preferably no less than 7 mass parts.On the other hand, from the angle for obtaining the improvement to match with increased costs From the point of view of degree, which is preferably more than 20 mass parts, more preferably no more than 15 mass parts, more preferably no more than 12 mass parts.

Silane coupling agent (C-1) can be used alone particular types, and also can be used in combination, its is two or more.

< organo-aluminum compound (D-1) >

Organo-aluminum compound (D-1) is the compound (complex) comprising aluminium and organic compound, and it is anti-by hydrolyzing The compound of aluminium hydroxide should be generated.Therefore, when mixing this organo-aluminum compound (D-1), organo-aluminum compound (D-1) is extremely Few a part hydrolyzes in kneading process, generates aluminium hydroxide.

The example of this organo-aluminum compound (D-1) includes the aluminium alcoholates indicated by formula (1):

Al(OR^a)(OR^b)(OR^c)₃(1)

In formula, R^a、R^bAnd R^cSeparately indicate aliphatic alkyl.Herein, aliphatic alkyl has branch or unbranched The aliphatic alkyl of alkyl, alkenyl or alkynyl as skeleton, and can have (with or without) hetero atom such as oxygen atom, nitrogen Atom etc..Preferably, aliphatic alkyl is with 1~12 carbon atom (C_1-12) (wherein, with alkenyl or alkynyl as bone In the case where frame, the lower limit of carbon atom number must be at least 2.Similarly hereinafter.), more preferable C_1-10, more preferable C_1-8, more preferable C_2-6's Aliphatic alkyl.By R^a、R^bOr R^cThe example of the aliphatic alkyl of expression includes ethyl (C₂), isopropyl (C₃), sec-butyl (C₄)、 3- ethoxy carbonyl -2- propylene -2- base (C₆) group etc..

The example of aluminium alcoholates includes aluminium ethylate, aluminium isopropoxide, diisopropanol list aluminium secondary butylate (aluminum Diisopropylate mono sec-butyrate), aluminium secondary butylate (aluminum sec-butyrate), acetoacetate second Base aluminium diisopropyl ester (aluminum ethylacetoacetate diisopropylate), three (oacetic acid) aluminium etc..

From the angle of good wet grip performance and wearability, relative to the rubber components (A-1) of 100 mass parts, The combined amount of organo-aluminum compound (D-1) is preferably not less than 5 mass parts, more preferably no less than 7 mass parts, more preferably no less than 10 Mass parts.On the other hand, for reason same as described above, which is preferably more than 45 mass parts, more preferably no more than 40 mass parts.

Organo-aluminum compound (D-1) can be used alone particular types, and also can be used in combination, its is two or more.

It is also optionally mixed other than mixing said ingredients in rubber composition one of according to first embodiment Common other compounding agents in tire industry are closed, for example, softening agent, antioxidant, wax, stearic acid, zinc oxide, vulcanizing agent (example Such as sulphur), vulcanization accelerator.

By mixing softening agent, can expect to improve wet grip performance, dry grip performance and initial stage grip performance etc..Softening Agent is not particularly limited, its example includes oil.The example of oil includes processing oil, such as paraffin series processing oil, aromatic system add Work oil and naphthene series processing oil.In miscella, from the perspective of obtaining the abundant effect by addition oil generation, relative to The rubber components (A-1) of 100 mass parts, oily combined amount are preferably not less than 20 mass parts, more preferably no less than 25 mass parts.Separately On the one hand, from the angle for keeping wearability, oily combined amount is preferably more than 70 mass parts, more preferably no more than 60 mass Part.It should be noted that oily content includes the oil mass for including in oil-extended rubber herein.

Softening agent can be used alone particular types, and also can be used in combination, its is two or more.

The example of vulcanization accelerator includes: sulfenamide system, thiazole system, thiuram system and guanidine system vulcanization accelerator.Secondary sulphur The example of amide system vulcanization accelerator includes N cyclohexyl 2 benzothiazole sulfenamide, N, N- dicyclohexyl -2-[4-morpholinodithio Sulfenamide, N tert butyl benzothiazole 2 sulfenamide etc..The example of thiazole system vulcanization accelerator includes 2- sulfydryl benzo thiophene Azoles, the cyclohexylamine salt of 2-mercaptobenzothiazole, two -2-[4-morpholinodithio based bisulfides etc..The example of thiuram system vulcanization Attached bag includes tetra methylthiuram list sulfide, tetra-benzyl thiram disulphide, four (2- ethylhexyl) thiuram disulfides Deng.The example of guanidine system vulcanization accelerator includes diphenylguanidine.

Rubber components when mixing vulcanization accelerator, from the angle for realizing full cure, relative to 100 mass parts (A-1), the content of vulcanization accelerator is preferably not less than 1 mass parts, more preferably no less than 2 mass parts.On the other hand, from ensuring foot From the perspective of enough time of scorch, the content of vulcanization accelerator is preferably more than 20 mass parts, more preferably no more than 15 mass Part.

Vulcanization accelerator can be used alone particular types, and also can be used in combination, its is two or more.

Rubber composition one of according to first embodiment can be prepared by a conventional method.I.e., it is possible to by with class The above-mentioned each component of the kneading such as mixer, kneader or open roll mill in uncle, the method then vulcanized as needed, or By other methods, to prepare rubber composition.

< application >

Rubber composition one of according to first embodiment can make full use of its characteristic, be used for various applications, also, wherein It may be used as rubber composition for tire.Use rubber composition one of according to first embodiment as tyre rubber When composition, it can be used for constituting the various components of tire, for example, for the tire including tread base (base tread) Face, liner layer, sidewall etc., also, according to its characteristic, it is preferred for tyre surface (tire tread).

When rubber composition one of according to first embodiment is used for tire, tire can be by conventional method by root It is prepared according to the rubber composition of one of first embodiment.That is, by that mixing said ingredients will obtain as suitably desired Mixture mediate, kneaded material is squeezed out in the unvulcanized stage and is processed into the shape of each structural tire part, and passes through conventional molding side Method forms on tyre building machine, to form unvulcanized tire.Can by the way that the unvulcanized tire is heated in vulcanizer and Compression, to produce tire, and by the way that air to be added in tire, can produce pneumatic tire.

Although not intended to it is bound by theory in any way, it is believed that replacing hydrogen using organo-aluminum compound (D-1) The effect of aluminium oxide is as follows.That is, although aluminium hydroxide helps to improve wet grip performance, since its partial size is relatively large And it does not have the binding site with rubber, therefore aluminium hydroxide inevitably reduces wearability.By making partial size become smaller, It can expect improve wearability to a certain extent.On the other hand, there are problems that the improvement space reduction of wet grip performance.So And organo-aluminum compound (D-1) is the compound that aluminium hydroxide is generated by hydrolysis, hydrolysis method is similar to silane coupling agent (C-1) hydrolysis method.Therefore, it cooperates with silane coupling agent (C-1), efficiently consumes the moisture in filler surface, and When mediating, shear strength becomes larger.As a result, thinking to mediate the sufficiently dispersibility of progress and filler is improved.In addition, recognizing For organo-aluminum compound (D-1) by with silane coupling agent (C-1) react identical in a manner of reacted with rubber, to enhance reinforcement rubber The effect of glue, so as to improve wearability.

< second embodiment >

Second embodiment is related to:

[1] a kind of rubber composition, includes feed chemicals, and the feed chemicals contain SBR styrene butadiene rubbers Rubber components (A-2), contain silica (B1-2) filler, the silane coupling agent (C-2) with sulfydryl and organic calorize It closes object (D-2),

Wherein, the silane coupling agent (C-2) is selected from comprising the connection unit A indicated by lower formula (I) and by lower formula (II) table The silane coupling agent of the connection unit B shown and at least one of the silane coupling agent indicated by lower formula (III),

In formula,

X is 0 or more integer, and y is 1 or more integer.

In formula,

R¹⁰⁰⁴For the bivalent hydrocarbon radical with 1~18 carbon atom.

R¹⁰⁰⁵For the monovalent hydrocarbon with 1~18 carbon atom.

[2] rubber composition according to above-mentioned [1], wherein filler also includes carbon black (B2-2),

[3] rubber composition according to above-mentioned [2], wherein relative to the rubber components (A-2) of 100 mass parts, titanium dioxide The combined amount of silicon (B1-2) is 50~150 mass parts, preferably 60~120 mass parts, more preferable 60~110 mass parts, carbon black (B2-2) combined amount be 5~50 mass parts, preferably 5~35 mass parts, more preferable 5~20 mass parts, further preferred 8~20 Mass parts, and the combined amount of organo-aluminum compound (D-2) be 5~45 mass parts, preferably 5~40 mass parts, more preferable 7~40 Mass parts, further preferred 10~40 mass parts；Relative to the silica (B1-2) of 100 mass parts, silane coupling agent (C-2) Combined amount be 1~20 mass parts, preferably 1.5~20 mass parts, more preferable 2~20 mass parts, further preferred 5~20 mass Part, further preferred 5~15 mass parts, further preferred 7~12 mass parts,

[4] rubber composition according to any one of above-mentioned [1]~[3], wherein organo-aluminum compound (D-2) is formula (1) Shown in aluminium alcoholates:

Al(OR^a)(OR^b)(OR^c)₃ (1)

In formula, R^a、R^bAnd R^cSeparately indicate aliphatic alkyl,

[6] a kind of tire, with tire tread described in above-mentioned [5],

According to second embodiment, can provide the rubber composition with excellent various characteristics (especially has and changes The rubber composition for tire of kind rubber breaking strength, wet grip performance and wearability and improved fuel economy) with And the tire tread and tire produced using the rubber composition.

The mode for implementing second embodiment is described below.

< rubber components (A-2) >

Rubber components (A-2) include SBR styrene butadiene rubbers (SBR).SBR is not particularly limited, and it is, for example, possible to use lotions The SBR styrene butadiene rubbers (E-SBR) of polymerization, the SBR styrene butadiene rubbers (S-SBR) of polymerisation in solution, their modification SBR styrene butadiene rubbers (modified S-SBR, modified E-SBR) etc..The example of modified SBR includes terminal-modified and/or main chain Modified SBR, the modification SBR being coupled with tin compound or silicon compound etc. are (for example, condensation product, have branched structure Modification SBR etc.).

From the perspective of sufficient wet grip performance and dry grip performance, the glass transition temperature (Tg) of SBR is preferred Not less than -60 DEG C, more desirably not less than -50 DEG C.In addition, from the perspective of good initial stage grip performance and wearability, Tg Preferably no greater than 0 DEG C, more preferably no higher than -10 DEG C.

From the angle of sufficient heat resistance and wearability, relative to the rubber components (A-2) of 100 mass %, SBR's Content is not less than 60 mass %, preferably not less than 70 mass %, more desirably not less than 80 mass %, more desirably not less than 90 matter Measure %, most preferably 100 mass %.

Other rubber components in addition to SBR can be mixed as rubber components (A-2).The example of this other rubber components Including diene series rubber, such as natural rubber (NR), butadiene rubber (BR), isoprene rubber (IR), styrene-isoamyl two Alkene-butadiene rubber (SIBR), neoprene (CR) and acrylonitrile-butadiene rubber (NBR)；Non- diene series rubber, such as ethylene- Propylenediene rubber (EPDM), butyl rubber (IIR) and halogenated butyl rubber (X-IIR)；Deng.These other rubber components can Particular types are used alone, also can be used in combination, its is two or more.

< filler >

Filler includes silica (B1-2).This is because can expect to improve wet when filler includes silica (B1-2) Grip performance and fuel economy.It is, for example, possible to use the silica of dry process (anhydride silica), wet processes to prepare Silica (aqueous silicon dioxide) etc. is used as silica (B1-2).Particularly, the silica of wet process preparation is because of silane The quantity of alcohol radical it is more and it is preferred that.

The angle that the wearability generated improves, silica are improved and improved by reinforcing property from fuel economy (B1-2) N2 adsorption BET specific surface area (N₂SA) it is preferably not less than 50m²/ g, more preferably no less than 70m²/ g is not more preferably small In 100m²/ g, more preferably no less than 120m²/ g is further preferably not less than 150m²/g.On the other hand, from ensuring good point From the perspective of dissipating property and inhibiting agglutination, the N of silica (B1-2)₂SA is preferably no greater than 500m²/ g, preferably no greater than 400m²/ g, more preferably no more than 300m²/g。

The N of silica (B1-2)₂SA is the value measured according to ASTM D3037-81 by BET method.

Silica (B1-2) can be used alone particular types, or can be used in combination that its is two or more.

Unless the purpose with second embodiment contradicts, otherwise any filler common in the art can be appropriate Ground is used as the filler in addition to silica (B1-2), and the example of this filler includes carbon black (B2-2).By mixing charcoal Black (B2-2), can expect the improvement of wearability.Preferably comprise the filler of silica (B1-2) and carbon black (B2-2).

As carbon black (B2-2), for example, having the carbon black etc. produced by Audit For Process, and it is two or more to can be used in combination Carbon black with different colloidal natures.Its example includes GPF, HAF, ISAF, SAF grade etc..

For the reasons why can obtaining good wet grip performance, dry grip performance and wearability, the nitrogen of carbon black (B2-2) Adsorption specific surface area (N₂It SA) is preferably 70~250m²/ g, more preferably 110~200m²/g.For the same reason, carbon black (B2-2) dibutyl phthalate oil absorption (DBP) is preferably 50~250ml/100g.It should be noted that carbon black (B2-2) N₂SA is the value measured according to JIS K6217-2:2001, and DPB is the value measured according to JIS K6217-4:2001.

Carbon black (B2-2) can be used alone particular types, or can be used in combination that its is two or more.

From the perspective of sufficient wet grip performance, relative to the rubber components (A-2) of 100 mass parts, silica (B1-2) combined amount is not less than 50 mass parts, more preferably no less than 60 mass parts.On the other hand, from its good dispersibility, And then good wearability from the perspective of, combined amount be not more than 150 mass parts, preferably no greater than 120 mass parts, more preferably not Greater than 110 mass parts.

From the perspective of good wet grip performance, dry grip performance and wearability, at mixed carbon black (B2-2), phase For the rubber components (A-2) of 100 mass parts, the combined amount of carbon black is preferably not less than 5 mass parts, more preferably no less than 8 mass Part.On the other hand, from the perspective of keeping good wet grip performance, combined amount is preferably no greater than 50 mass parts, more preferably No more than 35 mass parts, further preferably it is not more than 20 mass parts.

Rubber from the perspective of good wet grip performance, dry grip performance and wearability, relative to 100 mass parts Component (A-2), the combined amount of filler are preferably not less than 50 mass parts, preferably not less than 55 mass parts, more preferably no less than 65 matter Measure part.On the other hand, from the perspective of good wet grip performance and wearability, combined amount is not more than 170 mass parts, more excellent Choosing is not more than 150 mass parts, is further preferably not more than 120 mass parts.From the effect for satisfactorily showing second embodiment From the perspective of fruit, silica (B1-2) ratio shared in whole fillers is preferably not less than 70 mass %, more preferably not Less than 75 mass %, more preferably no less than 80 mass %.On the other hand, based on reason same as described above, which is not more than 95 mass %, more preferably no more than 90 mass %.

When filler is made of silica (B1-2) and carbon black (B2-2), the combined amount of carbon black (B2-2) can be by above-mentioned " total amount of filler " and " combined amount of silica (B1-2) " determines, alternatively, the combined amount of silica (B1-2) can be by Above-mentioned " total amount of filler " and " combined amount of carbon black (B2-2) " determines.

< silane coupling agent (C-2) >

Silane coupling agent (C-2) is the silane coupling agent with sulfydryl, and it is selected from the connection comprising being indicated by lower formula (I) In the silane coupling agent of the unit A and connection unit B indicated by lower formula (II) and the silane coupling agent indicated by lower formula (III) At least one.

In formula,

X is 0 or more integer, and y is 1 or more integer.

In formula,

R¹⁰⁰¹For selected from-Cl ,-Br ,-OR¹⁰⁰⁶,-O (O=) CR¹⁰⁰⁶,-ON=CR¹⁰⁰⁶R¹⁰⁰⁷,-ON=CR¹⁰⁰⁶R¹⁰⁰⁷、- NR¹⁰⁰⁶R¹⁰⁰⁷(OSiR¹⁰⁰⁶R¹⁰⁰⁷)_h(OSiR¹⁰⁰⁶R¹⁰⁰⁷R¹⁰⁰⁸) in univalent perssad (R¹⁰⁰⁶、R¹⁰⁰⁷And R¹⁰⁰⁸It can be identical or not Together, each is hydrogen atom or the monovalent hydrocarbon with 1~18 carbon atom, and the average value of h is 1~4).

R¹⁰⁰⁴For the bivalent hydrocarbon radical with 1~18 carbon atom.

R¹⁰⁰⁵For the monovalent hydrocarbon with 1~18 carbon atom.

X, y and z is to meet relationship x+y+2z=3,0≤x≤3,0≤y≤2 and the number of 0≤z≤1.

Since these have the sulfide moiety for C-S-C key according to the silane coupling agent (C-2) of second embodiment, because This they be heat-staple compared with polysulfide silanes (such as double-(3- triethoxysilylpropyltetrasulfide) tetrasulfide). Therefore, silane coupling agent (C-2) has the characteristic that can be mediated at relatively high temperatures.Therefore, it can sufficiently be removed when mediating The alcohol generated by the hydrolysis of aftermentioned organo-aluminum compound.In addition, using heat-staple according to the silane coupled of second embodiment When agent (C-2), advantage is: the rising of Mooney viscosity is less and the rising of process medium viscosity is inhibited.In addition, in root According in the silane coupling agent (C-2) of second embodiment, compared with hydrosulphonyl silane (such as 3-mercaptopropyi trimethoxy silane), The shortening of time of scorch is inhibited.Silane coupling agent (C-2) comprising connection unit A and connection unit B is in connection unit B With hydrosulphonyl silane structure.This is regarded as-the C because of connection unit A₇H₁₅Part can cover connection unit B-SH group, As a result, silane coupling agent (C-2) is difficult to and polymer reaction, so that incipient scorch (scorching；Scorching it) hardly sends out It is raw.

It is described below comprising by formula (I) connection unit A indicated and by the silane idol of formula (II) connection unit B indicated Join agent (C-2).

From the effect that effect and inhibition time of scorch shortening that above-mentioned inhibition process medium viscosity rises can be improved From the point of view of angle, in the silane coupling agent (C-2) with above structure, the content of connection unit A is preferably not less than 30 moles of %, More preferably no less than 50 moles of %, it is additionally preferred to be not more than 99 moles of %, more preferably no more than 90 moles of %.In addition, connection is single The content of first B is preferably not less than 1 mole of %, more preferably no less than 5 moles of %, is further preferably not less than 10 moles of %, in addition Preferably more than 70 moles of %, more preferably no more than 65 moles of % are further preferably no more than 55 moles of %.In addition, connection is single The total content of first A and connection unit B are preferably not less than 95 moles of %, more preferably no less than 98 moles of %, and particularly preferred 100 rub You are %.It should be noted that the content of connection unit A and connection unit B are to include connection unit A and connection unit B positioned at silane coupled The content of the case where end of agent (C-2).Connection unit A and connection unit B is located at the case where end silane coupling agent (C-2) Form is not particularly limited, and can form the list for corresponding to the formula (I) and formula (II) that indicate connection unit A and connection unit B Member.

R¹The example of halogen include chlorine, bromine and fluorine.

R¹Branch or the unbranched alkyl with 1~30 carbon atom example include methyl, ethyl, n-propyl, Isopropyl, normal-butyl, isobutyl group, sec-butyl, tert-butyl, amyl, hexyl, heptyl, 2- ethylhexyl, octyl, nonyl, decyl Deng.The carbon atom number of the alkyl is preferably 1~12.

R¹Branch or the example of the unbranched alkenyl with 2~30 carbon atoms include vinyl, 1- acrylic, 2- Acrylic, 1- cyclobutenyl, 2- cyclobutenyl, 1- pentenyl, 2- pentenyl, 1- hexenyl, 2- hexenyl, 1- octenyl etc..The alkene The carbon atom number of base is preferably 2~12.

R¹Branch or the example of the unbranched alkynyl with 2~30 carbon atoms include acetenyl, propinyl, butine Base, pentynyl, hexin base, heptynyl, octynyl, n-heptylacetylene base, decynyl, hendecyne base, dodecyne base etc..The alkynyl Carbon atom number is preferably 2~12.

R²Branch or the example of the unbranched alkylidene with 1~30 carbon atom include ethylidene, propylidene, Asia Butyl, pentylidene, hexylidene, heptamethylene, octamethylene, nonylene, decylene, alkylene undecyl, sub-dodecyl, sub- tridecane Base, sub- myristyl, sub- pentadecyl, sub- cetyl, sub- heptadecyl, alkylene octadecyl etc..The carbon atom of the alkylidene Number preferably 1~12.

R²Branch or the example of the unbranched alkenylene with 2~30 carbon atoms include ethenylidene, the Asia 1- third Alkenyl, 2- allylidene, 1- butenylidene, 2- butenylidene, 1- inferior pentenyl, 2- inferior pentenyl, the Asia 1- hexenyl, 2- it is sub- oneself Alkenyl, the Asia 1- octenyl etc..The carbon atom number of the alkenylene is preferably 2~12.

R²Branch or the example of the unbranched alkynylene with 2~30 carbon atoms include ethynylene, sub- propine Base, butynelene, sub- pentynyl, sub- hexin base, sub- heptynyl, sub- octynyl, sub- n-heptylacetylene base, sub- decynyl, sub- hendecyne Base, sub- dodecyne base etc..The carbon atom number of the alkynylene is preferably 2~12.

In the connection unit A comprising being indicated by formula (I) and by the silane coupling agent (C- of formula (II) the connection unit B indicated 2) in, the repetition total (x+y) of repeat number (x) including connection unit A and the repeat number (y) of connection unit B preferably 3~ In the range of 300.When repeating sum in the range, due to-the C of connection unit A₇H₁₅Part can cover connection unit B Hydrosulphonyl silane, thus time of scorch can be inhibited to shorten, and may also be ensured that and silica (B1-2) and rubber components (A- 2) good reactivity.

Workable includes by formula (I) connection unit A indicated and by the silane coupled of formula (II) connection unit B indicated The example of agent (C-2) includes NXT-Z30, NXT-Z45 and the NXT-Z60 etc. that can be obtained from MomentivePerformanceMaterials.

The silane coupling agent (C-2) indicated by formula (III) is described below.

In above-mentioned formula (III), it is preferable that R¹⁰⁰⁵、R¹⁰⁰⁶、R¹⁰⁰⁷And R¹⁰⁰⁸Separately for selected from 1~18 Group in the straight chain of carbon atom, the alkyl of ring-type or branch, alkenyl, aryl and aralkyl.In addition, in R¹⁰⁰²Be have 1~ When the monovalent hydrocarbon of 18 carbon atoms, it is preferably selected from the base of the alkyl of straight chain, ring-type or branch, alkenyl, aryl and aralkyl Group.R¹⁰⁰⁹The preferably alkylidene of straight chain, ring-type or branch, the particularly preferably alkylidene of straight chain.R¹⁰⁰⁴Example include have The alkylidene of 1~18 carbon atom, the alkenylene with 2~18 carbon atoms, the cycloalkylidene with 5~18 carbon atoms, Naphthenic base alkylidene with 6~18 carbon atoms, the arlydene with 6~18 carbon atoms and with 7-18 carbon atom Sub- aralkyl.Above-mentioned alkylidene and alkenylene can for straight chain or any one of the group of branch, and above-mentioned cycloalkylidene, Naphthenic base alkylidene, arlydene and sub- aralkyl can have functional group (such as low alkyl group) on its ring.Preferably, R¹⁰⁰⁴For Alkylidene with 1~6 carbon atom, particularly preferred straight-chain alkyl-sub, such as methylene, ethylidene, trimethylene, four methylenes Base, pentamethylene and hexa-methylene.

In above-mentioned formula (III), R¹⁰⁰²、R¹⁰⁰⁵、R¹⁰⁰⁶、R¹⁰⁰⁷And R¹⁰⁰⁸Example include methyl, it is ethyl, n-propyl, different Propyl, normal-butyl, isobutyl group, sec-butyl, tert-butyl, amyl, hexyl, octyl, decyl, dodecyl, cyclopenta, cyclohexyl, Vinyl, acrylic, allyl, hexenyl, octenyl, cyclopentenyl, cyclohexenyl group, phenyl, tolyl, xylyl, naphthalene Base, benzyl, phenethyl, naphthyl methyl etc..In above-mentioned formula (III), R¹⁰⁰⁹The example of straight-chain alkyl-sub include methylene, Asia Ethyl, n-propylene, positive butylidene and hexylidene；The example of branched alkylidene includes isopropylidene, isobutylene and 2- methyl Propylidene.

Example by above-mentioned formula (III) silane coupling agent (C-2) indicated includes 3- caproyl sulfopropyl triethoxy Silane, 3- Octanoylthio propyl-triethoxysilicane, 3- capryl sulfopropyl triethoxysilane, 3- lauroyl are thio Propyl-triethoxysilicane, 2- caproyl thio-ethyl triethoxysilane, 2- Octanoylthio ethyl triethoxysilane, 2- Capryl thio-ethyl triethoxysilane, 2- lauroyl thio-ethyl triethoxysilane, 3- caproyl sulfopropyl three Methoxy silane, 3- Octanoylthio propyl trimethoxy silicane, 3- capryl sulfopropyl trimethoxy silane, 3- lauroyl Base sulfopropyl trimethoxy silane, 2- caproyl thio-ethyl trimethoxy silane, 2- Octanoylthio ethyl trimethoxy Silane, 2- capryl thio-ethyl trimethoxy silane, 2- lauroyl thio-ethyl trimethoxy silane etc..Wherein, especially It is preferred that 3- Octanoylthio propyl-triethoxysilicane (the NXT silane purchased from MomentivePerformanceMaterials).

From the angle of good wearability, relative to the silica (B1-2) of 100 mass parts, silane coupling agent (C-2) combined amount is preferably not less than 1 mass parts, more preferably no less than 1.5 mass parts, more preferably no less than 2 mass parts, more excellent Choosing is not less than 5 mass parts, more preferably no less than 7 mass parts.On the other hand, from obtaining the improvement to match with increased costs From the point of view of angle, which is preferably more than 20 mass parts, more preferably no more than 15 mass parts, more preferably no more than 12 mass Part.

Silane coupling agent (C-2) can be used alone particular types, and also can be used in combination, its is two or more.

< organo-aluminum compound (D-2) >

Organo-aluminum compound (D-2) is the compound comprising aluminium and organic compound, and it is to generate hydrogen by hydrolysis The compound of aluminium oxide.Therefore, when mixing this organo-aluminum compound (D-2), at least one of organo-aluminum compound (D-2) Divide and hydrolyzed in kneading process, generates aluminium hydroxide.

The example of this organo-aluminum compound (D-2) includes the aluminium alcoholates indicated by formula (1):

Al(OR^a)(OR^b)(OR^c)₃ (1)

In formula, R^a、R^bAnd R^cSeparately indicate aliphatic alkyl.Herein, aliphatic alkyl has branch or unbranched The aliphatic alkyl of alkyl, alkenyl or alkynyl as skeleton, and can have (with or without) hetero atom, as oxygen atom, Nitrogen-atoms etc..Preferably, aliphatic alkyl is with 1~12 carbon atom (C_1-12) (wherein, with alkenyl or alkynyl conduct In the case where skeleton, the lower limit of carbon atom number must be at least 2.Similarly hereinafter.), more preferable C_1-10, more preferable C_1-8, more preferable C_2-6 Aliphatic alkyl.By R^a、R^bOr R^cThe example of the aliphatic alkyl of expression includes ethyl (C₂), isopropyl (C₃), sec-butyl (C₄), 3- ethoxy carbonyl -2- propylene -2- base (C₆) etc..

The example of aluminium alcoholates includes aluminium ethylate, aluminium isopropoxide, diisopropanol list aluminium secondary butylate, aluminium secondary butylate, acetoacetate Aluminium ethide diisopropyl ester, three (oacetic acid) aluminium etc..

From the angle of good wet grip performance and wearability, relative to the rubber components (A-2) of 100 mass parts, The combined amount of organo-aluminum compound (D-2) is preferably not less than 5 mass parts, more preferably no less than 7 mass parts, more preferably no less than 10 Mass parts.On the other hand, for reason same as described above, which is preferably more than 45 mass parts, more preferably no more than 40 mass parts.

Organo-aluminum compound (D-2) can be used alone particular types, and also can be used in combination, its is two or more.

According in the rubber composition of one of second embodiment, other than mixing said ingredients, also optionally mix Common other compounding agents in tire industry are closed, for example, softening agent, antioxidant, wax, stearic acid, zinc oxide, vulcanizing agent (example Such as sulphur), vulcanization accelerator.

By mixing softening agent, can expect to improve wet grip performance, dry grip performance and initial stage grip performance etc..Softening Agent is not particularly limited, its example includes oil.The example of oil includes processing oil, such as paraffin series processing oil, aromatic system add Work oil and naphthene series processing oil.In miscella, from the perspective of obtaining the abundant effect by addition oil generation, relative to The rubber components (A-2) of 100 mass parts, oily combined amount are preferably not less than 20 mass parts, more preferably no less than 25 mass parts.Separately On the one hand, from the angle for keeping wearability, oily combined amount is preferably more than 70 mass parts, more preferably no more than 60 mass Part.It should be noted that oily content includes the oil mass for including in oil-extended rubber herein.

Rubber components when mixing vulcanization accelerator, from the angle for realizing full cure, relative to 100 mass parts (A-2), the content of vulcanization accelerator is preferably not less than 1 mass parts, more preferably no less than 2 mass parts.On the other hand, from ensuring foot From the perspective of enough time of scorch, the content of vulcanization accelerator is preferably more than 20 mass parts, more preferably no more than 15 mass Part.

Vulcanization accelerator can be used alone particular types, and it is two or more that its can also be applied in combination.

It can be prepared by a conventional method according to the rubber composition of one of second embodiment.I.e., it is possible to by with class primary In mixer, kneader or open roll mill etc. mediate above-mentioned each component, the method then vulcanized as needed, or logical Other methods are crossed, to prepare rubber composition.

< application >

Its characteristic can be made full use of according to the rubber composition of one of second embodiment, is used for various applications, wherein can be with As rubber composition for tire.The rubber composition according to one of second embodiment is being used to combine as tyre rubber When object, it can be used for constituting the various components of tire, for example, for tyre surface, liner layer, sidewall including tread base Deng, also, according to its characteristic, it is preferred for tyre surface (tire tread).

When using tire is used for according to the rubber composition of one of second embodiment, tire can be by conventional method By being prepared according to the rubber composition of one of second embodiment.That is, by will mixing said ingredients as suitably desired Obtained mixture is mediated, and kneaded material squeezes out to the shape for being processed into each structural tire part in the unvulcanized stage, and by it is conventional at Type method forms on tyre building machine, to form unvulcanized tire.It can be by the way that the unvulcanized tire be added in vulcanizer Heat and compression, to produce tire, and by the way that air to be added in tire, can produce pneumatic tire.

Although not intended to it is bound by theory in any way, it is believed that replacing hydrogen using organo-aluminum compound (D-2) The effect of aluminium oxide is as follows.That is, although aluminium hydroxide helps to improve wet grip performance, since its partial size is relatively large And it does not have the binding site with rubber, therefore aluminium hydroxide inevitably reduces wearability.By making partial size become smaller, It can expect improve wearability to a certain extent.On the other hand, there are problems that the improvement space reduction of wet grip performance.So And organo-aluminum compound (D-2) is the compound that aluminium hydroxide is generated by hydrolysis, hydrolysis method is similar to silane coupling agent (C-2) hydrolysis method.Therefore, it cooperates with silane coupling agent (C-2), efficiently consumes the moisture in filler surface, and When mediating, shear strength becomes larger.As a result, thinking to mediate the sufficiently dispersibility of progress and filler is improved.In addition, recognizing For organo-aluminum compound (D-2) by with silane coupling agent (C-2) react identical in a manner of reacted with rubber, to enhance reinforcement rubber The effect of glue, so as to improve wearability.

In one of second embodiment, due to using heat-staple specific silane coupling agent (C-2), thus can be It is mediated at higher temperature.Therefore, it becomes easy sufficiently to remove to be hydrolyzed by organo-aluminum compound (D-2) in kneading stages and produce Raw alcohol.Unless sufficiently removing alcohol, a large amount of alcohol vapor otherwise can be generated in vulcanization, and will appear the influence due to steam And the problem of making the volume increase of rubber composition.Therefore, the advantages of second embodiment first is that can be filled before vulcanization Ground is divided to remove alcohol.

< third embodiment >

Third embodiment is related to:

[1] a kind of rubber composition, includes feed chemicals, and the feed chemicals contain SBR styrene butadiene rubbers Rubber components (A-3), contain silica (B1-3) filler, silane coupling agent (C-3) and organo-aluminum compound (D-3), The silica (B1-3), which has, is not less than 100m²/ g, it is preferably not less than 165m²/ g, more preferably no less than 170m²/ g's CTAB specific surface area and be not less than 110m²/ g, it is preferably not less than 175m²/ g, more preferably no less than 180m²The N2 adsorption BET of/g Specific surface area,

[2] rubber composition according to above-mentioned [1], wherein filler also includes carbon black (B2-3),

[3] rubber composition according to above-mentioned [2], wherein relative to the rubber components (A-3) of 100 mass parts, titanium dioxide The combined amount of silicon (B1-3) is 50~150 mass parts, preferably 60~120 mass parts, more preferable 60~110 mass parts, carbon black (B2-3) combined amount be 5~50 mass parts, preferably 5~35 mass parts, more preferable 5~20 mass parts, further preferred 8~20 Mass parts, and the combined amount of organo-aluminum compound (D-3) be 5~45 mass parts, preferably 5~40 mass parts, more preferable 7~40 Mass parts, further preferred 10~40 mass parts；Relative to the silica (B1-3) of 100 mass parts, silane coupling agent (C-3) Combined amount be 1~20 mass parts, preferably 1.5~20 mass parts, more preferable 2~20 mass parts, further preferred 5~20 mass Part, further preferred 5~15 mass parts, further preferred 7~12 mass parts,

[4] rubber composition according to any one of above-mentioned [1]~[3], wherein the CTAB of silica (B1-3) compares table Area is 180~600m²/ g, preferably 190~300m²/ g, more preferable 195~300m²/ g, further preferred 195~250m²/ g, Further preferred 197~250m²/ g, and the N2 adsorption BET specific surface area of silica (B1-3) is 185~600m²/ g, it is excellent Select 190~300m²/ g, more preferable 195~300m²/ g, further preferred 200~300m²/ g, further preferred 200~260m²/ G, further preferred 210~260m²/ g,

[5] rubber composition according to any one of above-mentioned [1]~[4], wherein organo-aluminum compound (D-3) is formula (1) Shown in aluminium alcoholates:

Al(OR^a)(OR^b)(OR^c)₃ (1)

In formula, R^a、R^bAnd R^cSeparately indicate aliphatic alkyl,

[6] a kind of tire tread is made using rubber composition described in any one of above-mentioned [1]~[5],

[7] a kind of tire, with tire tread described in above-mentioned [6],

According to third embodiment, can provide the rubber composition with excellent various characteristics (especially has and changes The rubber composition for tire of kind rubber breaking strength, wet grip performance and wearability and improved fuel economy) with And the tire tread and tire produced using the rubber composition.

The mode for implementing third embodiment is described below.

< rubber components (A-3) >

Rubber components (A-3) include SBR styrene butadiene rubbers (SBR).SBR is not particularly limited, and it is, for example, possible to use lotions The SBR styrene butadiene rubbers (E-SBR) of polymerization, the SBR styrene butadiene rubbers (S-SBR) of polymerisation in solution, their modification SBR styrene butadiene rubbers (modified S-SBR, modified E-SBR) etc..The example of modified SBR includes terminal-modified and/or main chain Modified SBR, the modification SBR being coupled with tin compound or silicon compound etc. are (for example, condensation product, have branched structure Modification SBR etc.).

From the perspective of sufficient wet grip performance and dry grip performance, the contents of ethylene of SBR is preferably not less than 20 Mole %, more preferably no less than 25 moles of %.On the other hand, from the perspective of good wearability, the contents of ethylene is excellent Choosing is not more than 80 moles of %, more preferably no more than 70 moles of %.It should be noted that the contents of ethylene of SBR is by infrared absorption light The value that spectral analysis method determines.

From the perspective of sufficient wet grip performance and dry grip performance, the styrene-content of SBR is preferably not less than 20 Quality %, more preferably no less than 25 mass %.On the other hand, (become from good wearability and temperature dependency relative to temperature The repressed state of the performance change of change) from the perspective of, which is preferably more than 60 mass %, does not surpass more preferably 50 mass % are crossed, 45 mass % are further preferably no more than.

From the perspective of sufficient wet grip performance and dry grip performance, the glass transition temperature (Tg) of SBR is preferred Not less than -60 DEG C, more desirably not less than -50 DEG C.In addition, from the perspective of good initial stage grip performance and wearability, it should Tg is preferably no greater than 0 DEG C, more preferably no higher than -10 DEG C.

From the angle of sufficient heat resistance and wearability, relative to the rubber components (A-3) of 100 mass %, SBR's Content is not less than 60 mass %, preferably not less than 70 mass %, more desirably not less than 80 mass %, more desirably not less than 90 matter Measure %, most preferably 100 mass %.

Other rubber components in addition to SBR can be mixed as rubber components (A-3).The example of this other rubber components It include: diene series rubber, such as natural rubber (NR), butadiene rubber (BR), isoprene rubber (IR), styrene-isoamyl two Alkene-butadiene rubber (SIBR), neoprene (CR) and acrylonitrile-butadiene rubber (NBR)；Non- diene series rubber, such as ethylene- Propylenediene rubber (EPDM), butyl rubber (IIR) and halogenated butyl rubber (X-IIR)；Deng.These other rubber components can Particular types are used alone, also can be used in combination, its is two or more.

< filler >

Filler includes silica (B1-3).This is because can expect wet to grab ground when filler includes silica (B1-3) The improvement of performance and fuel economy.It is, for example, possible to use the silica of dry process (anhydride silica), wet processes to prepare Silica (aqueous silicon dioxide) etc. be used as silica (B1-3).Particularly, the silica of wet process preparation is because of silicon The quantity of silane alcohol base it is more and it is preferred that.

The silica used in one of third embodiment (B1-3) is that have not less than 160m²The CTAB (ten of/g Six alkyl trimethyl ammonium bromides) specific surface area and be not less than 170m²N2 adsorption BET specific surface area (the N of/g₂SA titanium dioxide) Silicon (hereinafter also referred to as " silica particle ").Using this silica particle, there are processability deteriorations Worry.But in one of third embodiment, due to being used together with organo-aluminum compound (D-3), thus following fill out Material dispersibility is enhanced, and the advantages of can fully draw by addition silica and generate, that is, fuel economy changes Wearability that is kind and being generated by reinforcing improvement improves.

The CTAB specific surface area of silica particle (B1-3) is preferably not less than 165m²/ g, more preferably no less than 170m²/ g, More preferably no less than 180m²/ g, more preferably no less than 190m²/ g, more preferably no less than 195m²/ g, is further preferably not less than 197m²/g.On the other hand, from the perspective of ensuring good dispersibility and inhibiting agglutination, the CTAB specific surface area is preferably not Greater than 600m²/ g, more preferably no more than 300m²/ g is further preferably not more than 250m²/g.It should be noted that CTAB specific surface area root It is measured according to ASTM D3765-92.

BET specific surface area (the N of silica particle (B1-3)₂SA) it is preferably not less than 175m²/ g, more preferably no less than 180m²/ g, more preferably no less than 190m²/ g, more preferably no less than 195m²/ g, more preferably no less than 200m²/ g, further preferably Not less than 210m²/g.On the other hand, from the perspective of ensuring good dispersibility and inhibiting agglutination, the BET specific surface area is excellent Choosing is not more than 600m²/ g, more preferably no more than 300m²/ g is further preferably not more than 260m²/g.It should be noted that silica (B1-3) BET specific surface area is measured according to ASTM D3037-81.

The average primary particle diameter of silica particle (B1-3) is preferably more than 20nm, more preferably no more than 17nm, into one Step is preferably more than 16nm, is particularly preferably no more than 15nm.The lower limit of the average primary particle diameter is not particularly limited, preferably not small In 3nm, more preferably no less than 5nm, further preferably it is not less than 7nm.Although having so small average primary particle diameter, two Silica assembles the structure to be formed such as carbon black, and can further improve the dispersibility of silica (B1-3), thus into one Step improves reinforcing and wearability.It should be noted that can be by being seen with transmission electron microscope or scanning electron microscope It examines, the primary particle size of the silicon dioxide granule observed in the visual field of measurement 400 or more, and calculates its average value, come To the average primary particle diameter of silica particle (B1-3).

Silica (B1-3) can be used alone particular types, or can be used in combination that its is two or more.This combination packet Include the combination of silica particle and other type silica.

Unless contradicting with the purpose of third embodiment, otherwise any filler common in the art can be appropriate Ground is used as the filler in addition to silica (B1-3), and the example of this filler includes carbon black (B2-3).By mixing charcoal Black (B2-3), can expect the improvement of wearability.Preferably comprise the filler of silica (B1-3) and carbon black (B2-3).

As carbon black (B2-3), for example, having the carbon black etc. produced by Audit For Process, and the two or more tools that can be used in combination There is the carbon black of different colloidal natures.Its example includes GPF, HAF, ISAF, SAF grade etc..

For the reasons why can obtaining good wet grip performance, dry grip performance and wearability, the nitrogen of carbon black (B2-3) Adsorption specific surface area (N₂It SA) is preferably 70~250m²/ g, more preferably 110~200m²/g.For the same reason, carbon black (B2-3) dibutyl phthalate oil absorption (DBP) is preferably 50~250ml/100g.It should be noted that carbon black (B2-3) N₂SA is the value measured according to JIS K6217-2:2001, and DPB is the value measured according to JIS K6217-4:2001.

Carbon black (B2-3) can be used alone particular types, or can be used in combination that its is two or more.

From the perspective of sufficient wet grip performance, relative to the rubber components (A-3) of 100 mass parts, silica (B1-3) combined amount is not less than 50 mass parts, more preferably no less than 60 mass parts.On the other hand, from its good dispersibility, And then good wearability from the perspective of, the combined amount be not more than 150 mass parts, preferably no greater than 120 mass parts, more preferably No more than 110 mass parts.

From the perspective of good wet grip performance, dry grip performance and wearability, at mixed carbon black (B2-3), phase For the rubber components (A-3) of 100 mass parts, the combined amount of carbon black is preferably not less than 5 mass parts, more preferably no less than 8 mass Part.On the other hand, from the perspective of keeping good wet grip performance, which is preferably no greater than 50 mass parts, more excellent Choosing is not more than 35 mass parts, is further preferably not more than 20 mass parts.

Rubber from the perspective of good wet grip performance, dry grip performance and wearability, relative to 100 mass parts Component (A-3), the combined amount of filler are preferably not less than 50 mass parts, preferably not less than 55 mass parts, more preferably no less than 65 matter Measure part.On the other hand, from the perspective of good wet grip performance and wearability, which is not more than 170 mass parts, more Preferably no greater than 150 mass parts are further preferably not more than 120 mass parts.From satisfactorily showing third embodiment From the perspective of effect, silica (B1-3) ratio shared in whole fillers is preferably not less than 70 mass %, more preferably Not less than 75 mass %, more preferably no less than 80 mass %.On the other hand, based on reason same as described above, the ratio is little In 95 mass %, more preferably no more than 90 mass %.

When filler is made of silica (B1-3) and carbon black (B2-3), the combined amount of carbon black (B2-3) can be by above-mentioned " total amount of filler " and " combined amount of silica (B1-3) " determines, alternatively, the combined amount of silica (B1-3) can be by Above-mentioned " total amount of filler " and " combined amount of carbon black (B2-3) " determines.

< silane coupling agent (C-3) >

Silane coupling agent (C-3) is not particularly limited, and any silane coupling agent commonly used in the art can be suitably used.It is this The example of silane coupling agent (C-3) has: bis- (3- triethoxysilylpropyltetrasulfide) polysulfides, bis- (2- triethoxy first silicon Alkyl ethyl) polysulfide, bis- (3- trimethoxy-silylpropyl) polysulfides, bis- (2- trimethoxysilyl second Base) polysulfide, bis- (4- triethoxysilyl butyl) polysulfides, bis- (4- trimethoxysilyl butyl) more sulphur Compound etc..Wherein, preferably bis- (3- triethoxysilylpropyltetrasulfide) polysulfides and bis- (2- triethoxysilyl second Base) polysulfide, more preferable bis- (3- triethoxysilylpropyltetrasulfide) tetrasulfides and bis- (2- triethoxysilyl second Base) tetrasulfide.

From the angle of good wearability, relative to the silica (B1-3) of 100 mass parts, silane coupling agent (C-3) combined amount is preferably not less than 1 mass parts, more preferably no less than 1.5 mass parts, more preferably no less than 2 mass parts, preferably Not less than 5 mass parts, more preferably no less than 7 mass parts.On the other hand, from the angle for obtaining the improvement to match with increased costs From the point of view of degree, which is preferably more than 20 mass parts, more preferably no more than 15 mass parts, more preferably no more than 12 mass parts.

Silane coupling agent (C-3) can be used alone particular types, and also can be used in combination, its is two or more.

< organo-aluminum compound (D-3) >

Organo-aluminum compound (D-3) is the compound comprising aluminium and organic compound, and it is to generate hydrogen by hydrolysis The compound of aluminium oxide.Therefore, when mixing this organo-aluminum compound (D-3), at least one of organo-aluminum compound (D-3) Divide and hydrolyzed in kneading process, generates aluminium hydroxide.

The example of this organo-aluminum compound (D-3) includes the aluminium alcoholates indicated by formula (1):

Al(OR^a)(OR^b)(OR^c)₃ (1)

In formula, R^a、R^bAnd R^cSeparately indicate aliphatic alkyl.Herein, aliphatic alkyl has branch or unbranched The aliphatic alkyl of alkyl, alkenyl or alkynyl as skeleton, and can have (with or without) hetero atom such as oxygen atom, nitrogen Atom etc..Preferably, aliphatic alkyl is that have 1~12 carbon atom (C_1-12) (wherein, with alkenyl or alkynyl as bone In the case where frame, the lower limit of carbon atom number must be at least 2.Similarly hereinafter.), more preferable C_1-10, more preferable C_1-8, more preferable C_2-6's Aliphatic alkyl.By R^a、R^bOr R^cThe example of the aliphatic alkyl of expression includes ethyl (C₂), isopropyl (C₃), sec-butyl (C₄)、 3- ethoxy carbonyl -2- propylene -2- base (C₆) etc..

From the angle of good wet grip performance and wearability, relative to the rubber components (A-3) of 100 mass parts, The combined amount of organo-aluminum compound (D-3) is preferably not less than 5 mass parts, more preferably no less than 7 mass parts, more preferably no less than 10 Mass parts.On the other hand, for reason same as described above, which is preferably more than 45 mass parts, more preferably no more than 40 mass parts.

Organo-aluminum compound (D-3) can be used alone particular types, and also can be used in combination, its is two or more.

In the rubber composition according to one of third embodiment, other than mixing said ingredients, also optionally Common other compounding agents in tire industry are mixed, for example, softening agent, antioxidant, wax, stearic acid, zinc oxide, vulcanizing agent (such as sulphur), vulcanization accelerator etc..

By mixing softening agent, can expect to improve wet grip performance, dry grip performance and initial stage grip performance etc..Softening Agent is not particularly limited, its example includes oil.The example of oil includes processing oil, such as paraffin series processing oil, aromatic system add Work oil and naphthene series processing oil.In miscella, from the perspective of obtaining the abundant effect by addition oil generation, relative to The rubber components (A-3) of 100 mass parts, oily combined amount are preferably not less than 20 mass parts, more preferably no less than 25 mass parts.Separately On the one hand, from the angle for keeping wearability, oily combined amount is preferably more than 70 mass parts, more preferably no more than 60 mass Part.It should be noted that oily content includes the oil mass for including in oil-extended rubber herein.

Rubber components when mixing vulcanization accelerator, from the angle for realizing full cure, relative to 100 mass parts (A-3), the content of vulcanization accelerator is preferably not less than 1 mass parts, more preferably no less than 2 mass parts.On the other hand, from ensuring foot From the perspective of enough time of scorch, the content of vulcanization accelerator is preferably more than 20 mass parts, more preferably no more than 15 mass Part.

It can be prepared by a conventional method according to the rubber composition of one of third embodiment.I.e., it is possible to by with class primary In mixer, kneader or open roll mill etc. mediate above-mentioned each component, the method then vulcanized as needed, or logical Other methods are crossed, to prepare rubber composition.

< application >

Its characteristic can be made full use of according to the rubber composition of one of third embodiment, is used for various applications, wherein can be with As rubber composition for tire.The rubber composition according to one of third embodiment is being used to combine as tyre rubber When object, it can be used for constituting the various components of tire, for example, for tyre surface, liner layer, sidewall including tread base Deng, also, according to its characteristic, it is preferred for tyre surface (tire tread).

When using tire is used for according to the rubber composition of one of third embodiment, tire can be by conventional method By being prepared according to the rubber composition of one of third embodiment.That is, by will mixing said ingredients as suitably desired Obtained mixture is mediated, and kneaded material squeezes out to the shape for being processed into each structural tire part in the unvulcanized stage, and by it is conventional at Type method forms on tyre building machine, to form unvulcanized tire.It can be by the way that the unvulcanized tire be added in vulcanizer Heat and compression, to produce tire, and by the way that air to be added in tire, can produce pneumatic tire.

Although not intended to it is bound by theory in any way, it is believed that replacing hydrogen using organo-aluminum compound (D-3) The effect of aluminium oxide is as follows.That is, although aluminium hydroxide helps to improve wet grip performance, since its partial size is relatively large And it does not have the binding site with rubber, therefore aluminium hydroxide inevitably reduces wearability.By making partial size become smaller, It can expect improve wearability to a certain extent.On the other hand, there are problems that the improvement space reduction of wet grip performance.So And organo-aluminum compound (D-3) is the compound that aluminium hydroxide is generated by hydrolysis, hydrolysis method is similar to silane coupling agent (C-3) hydrolysis method.Therefore, it cooperates with silane coupling agent (C-3), efficiently consumes the moisture in filler surface, and When mediating, shear strength becomes larger.As a result, thinking to mediate the sufficiently dispersibility of progress and filler is improved.In addition, recognizing For organo-aluminum compound (D-3) by with silane coupling agent (C-3) react identical in a manner of reacted with rubber, to enhance reinforcement rubber The effect of glue, so as to improve wearability.

It also contributes to inhibiting as described above by the improvement of mixing organo-aluminum compound (D-3) bring filler dispersibility Processability reduction (or even in particular, using have small particle silica (so-called silica particle) the case where Under processability reduction).Therefore, by the way that organo-aluminum compound and silica (especially particle titanium dioxide is applied in combination Silicon), can fully obtain mixing silica the advantages of, that is, the raising of fuel economy and by it is reinforcing improve generate The improvement of wearability.

The 4th embodiment > of <

4th embodiment is related to:

[1] a kind of preparation method of rubber composition, the rubber composition include feed chemicals, the feed chemicals packet Containing the rubber components (A-4) containing SBR styrene butadiene rubbers, contain filler, the silane coupling agent (C- of silica (B1-4) 4) and organo-aluminum compound (D-4),

Wherein, kneading step included at least two stages, and at least two stage includes mediating the original for being free of sulfur vulcanization chemistries product Expect the first half stage (X1-1) of chemicals and sulfur vulcanization chemistries product and kneaded mixture are added into the kneaded material of first half stage acquisition Rear half stage (X1-2), and

Wherein, in first half stage (X1-1), the discharge temperature of kneaded material is the temperature within the scope of predetermined temperature, and will Kneaded material keeps predetermined period of time under the discharge temperature, to remove the alcohol generated in kneading process,

[2] preparation method of the rubber composition according to above-mentioned [1], wherein filler also includes carbon black (B2-4),

[3] preparation method of the rubber composition according to above-mentioned [2], wherein the rubber components relative to 100 mass parts (A-4), the combined amount of silica (B1-4) is 50~150 mass parts, preferably 60~120 mass parts, more preferable 60~110 matter Measure part, the combined amount of carbon black (B2-4) is 5~50 mass parts, preferably 5~35 mass parts, more preferable 5~20 mass parts, further It is preferred that 8~20 mass parts, and the combined amount of organo-aluminum compound (D-4) is 5~45 mass parts, preferably 5~40 mass parts, more It is preferred that 7~40 mass parts, further preferred 10~40 mass parts；Relative to the silica (B1-4) of 100 mass parts, silane is even Join agent (C-4) combined amount be 1~20 mass parts, preferably 1.5~20 mass parts, more preferable 2~20 mass parts, further preferably 5~20 mass parts, further preferred 5~15 mass parts, further preferred 7~12 mass parts,

[4] preparation method of the rubber composition according to any one of above-mentioned [1]~[3], wherein organo-aluminum compound (D-4) it is aluminium alcoholates shown in formula (1):

Al(OR^a)(OR^b)(OR^c)₃ (1)

In formula, R^a、R^bAnd R^cSeparately indicate aliphatic alkyl,

[5] preparation method of the rubber composition according to any one of above-mentioned [1]~[4], wherein in scheduled temperature model Temperature in enclosing is 150~180 DEG C, preferably 150~175 DEG C, more preferable 155~175 DEG C, and predetermined period of time is 10 ~120 seconds, preferably 15~100 seconds, and

[6] a kind of manufacturing method of tire, comprising:

The step of preparing rubber composition by the preparation method of rubber composition described in any one of above-mentioned [1]~[5],

The step of rubber composition is extruded as the shape of tire tread,

The step of tire tread is formed on tyre building machine together with other structural tire parts, forms unvulcanized tire, and

The step of vulcanizing the unvulcanized tire.

According to the 4th embodiment, the preparation method that can provide the rubber composition with excellent various characteristics is (special It is not the rubber composition for tire with improved processability, wet grip performance and wearability and improved fuel economy Preparation method), the rubber composition prepared by the preparation method and the tire tread produced using the rubber composition And tire.

The mode for implementing the 4th embodiment is described below.

< rubber components (A-4) >

Rubber components (A-4) include SBR styrene butadiene rubbers (SBR).SBR is not particularly limited, and it is, for example, possible to use lotions The SBR styrene butadiene rubbers (E-SBR) of polymerization, the SBR styrene butadiene rubbers (S-SBR) of polymerisation in solution, their modification SBR styrene butadiene rubbers (modified S-SBR, modified E-SBR) etc..The example of modified SBR includes terminal-modified and/or main chain Modified SBR, the modification SBR being coupled with tin compound or silicon compound etc. are (for example, condensation product, have branched structure Modification SBR etc.).

From the perspective of sufficient wet grip performance and dry grip performance, the glass transition temperature (Tg) of SBR is preferred Not less than -60 DEG C, more desirably not less than -50 DEG C.From the perspective of good initial stage grip performance and wearability, the Tg is preferred Not higher than 0 DEG C, more preferably no higher than -10 DEG C.

From the angle of sufficient heat resistance and wearability, relative to the rubber components (A-4) of 100 mass %, SBR's Content is not less than 60 mass %, preferably not less than 70 mass %, more desirably not less than 80 mass %, more desirably not less than 90 matter Measure %, most preferably 100 mass %.

Other rubber components in addition to SBR can be mixed as rubber components (A-4).The example of this other rubber components It include: diene series rubber, such as natural rubber (NR), butadiene rubber (BR), isoprene rubber (IR), styrene-isoamyl two Alkene-butadiene rubber (SIBR), neoprene (CR) and acrylonitrile-butadiene rubber (NBR)；Non- diene series rubber, such as ethylene- Propylenediene rubber (EPDM), butyl rubber (IIR) and halogenated butyl rubber (X-IIR)；Deng.These other rubber components can Particular types are used alone, also can be used in combination, its is two or more.

< filler >

Filler includes silica (B1-4).This is because can expect wet to grab ground when filler includes silica (B1-4) The improvement of performance and fuel economy.It is, for example, possible to use the silica of dry process (anhydride silica), wet processes to prepare Silica (aqueous silicon dioxide) etc. be used as silica (B1-4).Particularly, the silica of wet process preparation is because of silicon The quantity of silane alcohol base it is more and it is preferred that.

The angle that the wearability generated improves, silica are improved and improved by reinforcing property from fuel economy (B1-4) N2 adsorption BET specific surface area (N₂SA) it is preferably not less than 50m²/ g, more preferably no less than 70m²/ g is not more preferably small In 100m²/ g, more preferably no less than 120m²/ g is further preferably not less than 150m²/g.On the other hand, from ensuring good point From the perspective of dissipating property and inhibiting agglutination, the N of silica (B1-4)₂SA is preferably no greater than 500m²/ g, preferably no greater than 400m²/ g, more preferably no more than 300m²/g。

The N of silica (B1-4)₂SA is the value measured according to ASTM D3037-81 by BET method.

Silica (B1-4) can be used alone particular types, or can be used in combination that its is two or more.

Unless contradicting with the purpose of the 4th embodiment, otherwise any filler common in the art can be appropriate Ground is used as the filler in addition to silica (B1-4), and the example of this filler includes carbon black (B2-4).By mixing charcoal Black (B2-4), can expect the improvement of wearability.Preferably comprise the filler of silica (B1-4) and carbon black (B2-4).

As carbon black (B2-4), for example, having the carbon black etc. produced by Audit For Process, and the two or more tools that can be used in combination There is the carbon black of different colloidal natures.Its example includes GPF, HAF, ISAF, SAF grade etc..

For the reasons why can obtaining good wet grip performance, dry grip performance and wearability, the nitrogen of carbon black (B2-4) Adsorption specific surface area (N₂It SA) is preferably 70~250m²/ g, more preferably 110~200m²/g.For the same reason, carbon black (B2-4) dibutyl phthalate oil absorption (DBP) is preferably 50~250ml/100g.It should be noted that carbon black (B2-4) N₂SA is the value measured according to JIS K6217-2:2001, and DPB is the value measured according to JIS K6217-4:2001.

Carbon black (B2-4) can be used alone particular types, or can be used in combination that its is two or more.

From the perspective of sufficient wet grip performance, relative to the rubber components (A-4) of 100 mass parts, silica (B1-4) combined amount is not less than 50 mass parts, more preferably no less than 60 mass parts.On the other hand, from its good dispersibility, And then good wearability from the perspective of, the combined amount be not more than 150 mass parts, preferably no greater than 120 mass parts, more preferably No more than 110 mass parts.

From the perspective of good wet grip performance, dry grip performance and wearability, at mixed carbon black (B2-4), phase For the rubber components (A-4) of 100 mass parts, the combined amount of carbon black is preferably not less than 5 mass parts, more preferably no less than 8 mass Part.On the other hand, from the perspective of keeping good wet grip performance, which is preferably no greater than 50 mass parts, more excellent Choosing is not more than 35 mass parts, is further preferably not more than 20 mass parts.

Rubber from the perspective of good wet grip performance, dry grip performance and wearability, relative to 100 mass parts Component (A-4), the combined amount of filler are preferably not less than 50 mass parts, preferably not less than 55 mass parts, more preferably no less than 65 matter Measure part.On the other hand, from the perspective of good wet grip performance and wearability, which is not more than 170 mass parts, more Preferably no greater than 150 mass parts are further preferably not more than 120 mass parts.From satisfactorily showing the 4th embodiment From the perspective of effect, silica (B1-4) ratio shared in whole fillers is preferably not less than 70 mass %, more preferably Not less than 75 mass %, more preferably no less than 80 mass %.On the other hand, based on reason same as described above, the ratio is little In 95 mass %, more preferably no more than 90 mass %.

When filler is made of silica (B1-4) and carbon black (B2-4), the combined amount of carbon black (B2-4) can be by above-mentioned " total amount of filler " and " combined amount of silica (B1-4) " determines, alternatively, the combined amount of silica (B1-4) can be by Above-mentioned " total amount of filler " and " combined amount of carbon black (B2-4) " determines.

< silane coupling agent (C-4) >

Silane coupling agent (C-4) is not particularly limited, and any silane coupling agent commonly used in the art can be suitably used.It is this The example of silane coupling agent (C-4) has: bis- (3- triethoxysilylpropyltetrasulfide) polysulfides, bis- (2- triethoxy first silicon Alkyl ethyl) polysulfide, bis- (3- trimethoxy-silylpropyl) polysulfides, bis- (2- trimethoxysilyl second Base) polysulfide, bis- (4- triethoxysilyl butyl) polysulfides, bis- (4- trimethoxysilyl butyl) more sulphur Compound etc..Wherein, preferably bis- (3- triethoxysilylpropyltetrasulfide) polysulfides and bis- (2- triethoxysilyl second Base) polysulfide, more preferable bis- (3- triethoxysilylpropyltetrasulfide) tetrasulfides and bis- (2- triethoxysilyl second Base) tetrasulfide.

From the angle of good wearability, relative to the silica (B1-4) of 100 mass parts, silane coupling agent (C-4) combined amount is preferably not less than 1 mass parts, more preferably no less than 1.5 mass parts, more preferably no less than 2 mass parts, preferably Not less than 5 mass parts, more preferably no less than 7 mass parts.On the other hand, from the angle for obtaining the improvement to match with increased costs From the point of view of degree, which is preferably more than 20 mass parts, more preferably no more than 15 mass parts, more preferably no more than 12 mass parts.

Silane coupling agent (C-4) can be used alone particular types, and also can be used in combination, its is two or more.

< organo-aluminum compound (D-4) >

Organo-aluminum compound (D-4) is the compound comprising aluminium and organic compound, and it is to generate hydrogen by hydrolysis The compound of aluminium oxide.Therefore, when mixing this organo-aluminum compound (D-4), at least one of organo-aluminum compound (D-4) Divide and hydrolyzed in kneading process, generates aluminium hydroxide.

The example of this organo-aluminum compound (D-4) includes the aluminium alcoholates indicated by formula (1):

Al(OR^a)(OR^b)(OR^c)₃ (1)

From the angle of good wet grip performance and wearability, relative to the rubber components (A-4) of 100 mass parts, The combined amount of organo-aluminum compound (D-4) is preferably not less than 5 mass parts, more preferably no less than 7 mass parts, more preferably no less than 10 Mass parts.On the other hand, for reason same as described above, which is preferably more than 45 mass parts, more preferably no more than 40 mass parts.

Organo-aluminum compound (D-4) can be used alone particular types, and also can be used in combination, its is two or more.

In the rubber composition according to one of the 4th embodiment, other than mixing said ingredients, also optionally Common other compounding agents in tire industry are mixed, for example, softening agent, antioxidant, wax, stearic acid, zinc oxide, vulcanizing agent (such as sulphur), vulcanization accelerator etc..

By mixing softening agent, can expect to improve wet grip performance, dry grip performance and initial stage grip performance etc..Softening Agent is not particularly limited, its example includes oil.The example of oil includes processing oil, such as paraffin series processing oil, aromatic system add Work oil and naphthene series processing oil.In miscella, from the perspective of obtaining the abundant effect by addition oil generation, relative to The rubber components (A-4) of 100 mass parts, oily combined amount are preferably not less than 20 mass parts, more preferably no less than 25 mass parts.Separately On the one hand, from the angle for keeping wearability, oily combined amount is preferably more than 70 mass parts, more preferably no more than 60 mass Part.It should be noted that oily content includes the oil mass for including in oil-extended rubber herein.

Rubber components when mixing vulcanization accelerator, from the angle for realizing full cure, relative to 100 mass parts (A-4), the content of vulcanization accelerator is preferably not less than 1 mass parts, more preferably no less than 2 mass parts.On the other hand, from ensuring foot From the perspective of enough time of scorch, the content of vulcanization accelerator is preferably more than 20 mass parts, more preferably no more than 15 mass Part.

The preparation method > of < rubber composition

Preparation method according to the rubber composition of one of the 4th embodiment includes kneading step, and the kneading step includes extremely Few two stages, at least two stage include the first half stage (X1-1) for mediating the feed chemicals without sulfur vulcanization chemistries product It is also, preceding with the rear half stage (X2-1) that sulfur vulcanization chemistries product and kneaded mixture are added in the kneaded material that obtains to the first half stage Half stage, (X1-1) was characterized in that, the discharge temperature of kneaded material is the temperature within the scope of predetermined temperature, and will be mediated Object keeps predetermined period of time under the discharge temperature, to remove the alcohol generated in kneading process.Other than this feature, It can be prepared by a conventional method according to the rubber composition of one of the 4th embodiment.I.e., it is possible to by with Banbury mixing Machine, kneader or open roll mill etc. mediate above-mentioned each component, the method then vulcanized as needed, or pass through other Method, to prepare rubber composition.

In one of the 4th embodiment, kneading step included at least two stages, and at least two stage includes pinching Close the first half stage (X1-1) of the feed chemicals without sulfur vulcanization chemistries product and into the kneaded material of first half stage (X1-1) acquisition The rear half stage (terminal stage) (X2-1) of sulfur vulcanization chemistries product and kneaded mixture is added.In addition, as needed, the first half stage (X1-1) multiple stages can be further classified as.Herein, sulfur vulcanization chemistries product are for so-called vulcanization (that is, crosslinking is as modeling The polymer chain of the rubber components of property material) chemicals, specifically vulcanizing agent, vulcanization accelerator, vulcanization aid etc..

(the first half stage (X1-1) of kneading step)

More specifically, the first half stage (X1-1) of kneading step is mixed rubber component (A-4), filler (B1-4, B2-4), silane The stage of coupling agent (C-4) and organo-aluminum compound (D-4) and kneaded mixture.In first half stage (X1-1), it can mix soft Agent, stearic acid etc..The first half stage (X1-1) does not include the stage for only mediating rubber components (A-4) in advance.In the 4th embodiment One of in, be discharged kneading step the first half stage (X1-1) kneaded material when, the discharge temperature of kneaded material is set in predetermined Within the temperature range of and kneaded material kept under the discharge temperature predetermined period of time purpose be in order to: remove due to having The hydrolysis of machine aluminium compound etc. and the alcohol generated in kneading process.If the removing of alcohol is insufficient, in kneading process by Alcohol generates a large amount of steam, and foams inside rubber composition.Such case and to obtain mixing following organic in order to prevent The effect of aluminium compound (D-4), within the scope of predetermined temperature at a temperature of by kneaded material holding predetermined period of time be to have Effect.

Therefore, kneading step the first half stage (X1-1) be discharged kneaded material when, keep kneaded material " in scheduled temperature Temperature and predetermined period of time in range " can be for " when being enough to remove the holding temperature of the alcohol generated during kneading and keep Between ".It is such to be kept for temperature and retention time type, other kinds using raw material according to organo-aluminum compound (D-4) Class etc. and change, and those skilled in the art can suitably be set based on above-mentioned purpose.

Pass through the revolution of adjusting mixer, the pressure pressure of pressure head (ram), the in a mixer temperature of cooling water that recycles Deng, it can be by the setting of above-mentioned holding temperature within a predetermined range, and those skilled in the art can suitably set the temperature.

In the first half stage (X1-1) of kneading step, the discharge temperature of kneaded material is generally preferably not less than 150 DEG C, more excellent Choosing is not less than 155 DEG C.When discharge temperature is lower than 150 DEG C, there are following tendencies: silica reacts change with silane coupling agent Must be insufficient, and wearability and fuel economy deteriorate rather than improve.On the other hand, the discharge temperature is not generally preferably high In 180 DEG C, more preferably no higher than 175 DEG C.When discharge temperature is higher than 180 DEG C, there are the gelations inside rubber excessively to accelerate The tendency reduced with processability.

From the perspective of the effect for showing the 4th embodiment, discharge is pinched in the first half stage (X1-1) of kneading step Retention time when closing object is generally preferably not less than 10 seconds, more preferably no less than 15 seconds.On the other hand, the retention time is usually excellent Choosing is no more than 120 seconds, more preferably no more than 100 seconds.Even if will be extended beyond the retention time 120 seconds, there is also following tendencies: It could not be expected that productivity reduces on the contrary thus to obtain the improvement of effect.

Can be as needed, the first half stage (X1-1) of kneading step is divided into multiple stages, for example, by above-mentioned chemicals (A) kneading of~chemicals (D) etc. be divided into repeatedly periodically to be mediated in the case where.Under any circumstance, in first half In stage (X1-1), in order to remove by the purpose of the alcohol of mixed organo-aluminum compound (D-4) generation and in order to realize the removing, When kneaded material is discharged, by kneaded material within the scope of predetermined temperature at a temperature of keep predetermined period of time.

Other than above-mentioned item, first half stage (X1-1) of kneading step can be according to generalling use in rubber industry Conventional method carries out.

(rear half stage (X2-1) of kneading step)

The rear half stage (X2-1) of kneading step is that sulfur vulcanization chemistries product and other remaining chemicals are mixed into the acquisition of first half stage Kneaded material in and kneaded mixture kneading step terminal stage.The rear half stage (X2-1) of kneading step can be according to rubber The conventional method generallyd use in glue industry carries out.

< application >

Its characteristic can be made full use of according to the rubber composition of one of the 4th embodiment, is used for various applications, wherein can be with As rubber composition for tire.The rubber composition according to one of the 4th embodiment is being used to combine as tyre rubber When object, it can be used for constituting the various components of tire, for example, for tyre surface, liner layer, sidewall including tread base Deng, also, according to its characteristic, it is preferred for tyre surface (tire tread).

When being used for tire according to the rubber composition of one of the 4th embodiment, tire can be by conventional method by root It is prepared according to the rubber composition of one of the 4th embodiment.That is, by that mixing said ingredients will obtain as suitably desired Mixture mediate, kneaded material is squeezed out in the unvulcanized stage and is processed into the shape of each structural tire part, and passes through conventional molding side Method forms on tyre building machine, to form unvulcanized tire.Can by the way that the unvulcanized tire is heated in vulcanizer and Compression, to produce tire, and by the way that air to be added in tire, can produce pneumatic tire.

Although not intended to it is bound by theory in any way, it is believed that replacing hydrogen using organo-aluminum compound (D-4) The effect of aluminium oxide is as follows.That is, although aluminium hydroxide helps to improve wet grip performance, since its partial size is relatively large And it does not have the binding site with rubber, therefore aluminium hydroxide inevitably reduces wearability.By making partial size become smaller, It can expect improve wearability to a certain extent.On the other hand, there are problems that the improvement space reduction of wet grip performance.So And organo-aluminum compound (D-4) is the compound that aluminium hydroxide is generated by hydrolysis, hydrolysis method is similar to silane coupling agent (C-4) hydrolysis method.Therefore, it cooperates with silane coupling agent (C-4), efficiently consumes the moisture in filler surface, and When mediating, shear strength becomes larger.As a result, thinking to mediate the sufficiently dispersibility of progress and filler is improved.In addition, recognizing For organo-aluminum compound (D-4) by with silane coupling agent (C-4) react identical in a manner of reacted with rubber, to enhance reinforcement rubber The effect of glue, so as to improve wearability.

The 5th embodiment > of <

5th embodiment is related to:

[1] a kind of preparation method of rubber composition, the rubber composition include feed chemicals, the feed chemicals packet Containing the rubber components (A-5) containing SBR styrene butadiene rubbers, contain filler, the silane coupling agent (C- of silica (B1-5) 5) and organo-aluminum compound (D-5),

Wherein, kneading step included at least two stages, and at least two stage includes mediating the raw material for being free of vulcanizing agent Vulcanizing agent and kneaded mixture is added in the first half stage (X1-2) of product and the kneaded material obtained to first half stage (X1-2) Rear half stage (X2-2), and

Wherein, the first half stage (X1-2) is added to alkaline vulcanization accelerator (E-5) comprising rubber components, filler, silane idol Join in the feed chemicals of agent and organo-aluminum compound and the stage of kneaded mixture.

[2] preparation method of the rubber composition according to above-mentioned [1], wherein the first half stage (X1-2) includes including first At least two stages in stage and terminal stage,

Wherein, the first stage is the stage for mediating feed chemicals, and the feed chemicals include rubber components (A-5), dioxy Some or all of some or all of SiClx (B1-5) and silane coupling agent (C-5),

Wherein, terminal stage is such stage: in the kneaded material obtained to the first stage to the previous stage of terminal stage, being mixed The feed chemicals comprising at least residue of any one in silica (B1-5) and silane coupling agent (C-5) are closed, then Kneaded mixture, and

Wherein, the mixed-alkali vulcanization accelerator (E-5) in at least either phase from first stage to terminal stage,

[3] preparation method of the rubber composition according to above-mentioned [2], wherein the first half stage (X1-2) by the first stage and Terminal stage composition,

[4] preparation method of the rubber composition according to any one of above-mentioned [1]~[3], wherein alkaline vulcanization accelerator (E-5) in guanidine system vulcanization accelerator, aldehyde ammonia system vulcanization accelerator, aldehyde amine system vulcanization accelerator and thiocarbamide system vulcanization accelerator At least one,

[5] preparation method of the rubber composition according to any one of above-mentioned [1]~[4], wherein filler also includes carbon black (B2-5),

[6] preparation method of the rubber composition according to above-mentioned [5], wherein the rubber components relative to 100 mass parts (A-5), the combined amount of silica (B1-5) is 50~150 mass parts, preferably 60~120 mass parts, more preferable 60~110 matter Measure part, the combined amount of carbon black (B2-5) is 5~50 mass parts, preferably 5~35 mass parts, more preferable 5~20 mass parts, further It is preferred that 8~20 mass parts, and the combined amount of organo-aluminum compound (D-5) is 5~45 mass parts, preferably 5~40 mass parts, more It is preferred that 7~40 mass parts, further preferred 10~40 mass parts；Relative to the silica (B1-5) of 100 mass parts, silane is even Join agent (C-5) combined amount be 1~20 mass parts, preferably 1.5~20 mass parts, more preferable 2~20 mass parts, further preferably 5~20 mass parts, further preferred 5~15 mass parts, further preferred 7~12 mass parts,

[7] preparation method of the rubber composition according to any one of above-mentioned [1]~[6], wherein organo-aluminum compound (D-5) it is aluminium alcoholates shown in formula (1):

Al(OR^a)(OR^b)(OR^c)₃ (1)

In formula, R^a、R^bAnd R^cSeparately indicate aliphatic alkyl,

[8] a kind of preparation method of tire, comprising:

The step of preparing rubber composition by the preparation method of rubber composition described in any one of above-mentioned [1]~[7],

The step of rubber composition is extruded as the shape of tire tread,

The step of vulcanizing the unvulcanized tire.

According to the 5th embodiment, the preparation method of the rubber composition with excellent various characteristics can be provided, it is (special It is not rubber composition for tire especially with improved wet grip performance and wearability and improved fuel economy Preparation method), the rubber composition that is prepared by the preparation method and the tire tread produced using the rubber composition and Tire.

The mode for implementing the 5th embodiment is described below.

< rubber components (A-5) >

Rubber components (A-5) include SBR styrene butadiene rubbers (SBR).SBR is not particularly limited, and it is, for example, possible to use lotions The SBR styrene butadiene rubbers (E-SBR) of polymerization, the SBR styrene butadiene rubbers (S-SBR) of polymerisation in solution, their modification SBR styrene butadiene rubbers (modified S-SBR, modified E-SBR) etc..The example of modified SBR includes terminal-modified and/or main chain Modified SBR, the modification SBR being coupled with tin compound or silicon compound etc. are (for example, condensation product, have branched structure Modification SBR etc.).

From the angle of sufficient heat resistance and wearability, relative to the rubber components (A-5) of 100 mass %, SBR's Content is not less than 60 mass %, preferably not less than 70 mass %, more desirably not less than 80 mass %, more desirably not less than 90 matter Measure %, most preferably 100 mass %.

Other rubber components in addition to SBR can be mixed as rubber components (A-5).The example of this other rubber components It include: diene series rubber, such as natural rubber (NR), butadiene rubber (BR), isoprene rubber (IR), styrene-isoamyl two Alkene-butadiene rubber (SIBR), neoprene (CR) and acrylonitrile-butadiene rubber (NBR)；Non- diene series rubber, such as ethylene- Propylenediene rubber (EPDM), butyl rubber (IIR) and halogenated butyl rubber (X-IIR)；Deng.These other rubber components can Particular types are used alone, also can be used in combination, its is two or more.

< filler >

Filler includes silica (B1-5).This is because can expect wet to grab ground when filler includes silica (B1-5) The improvement of performance and fuel economy.It is, for example, possible to use the silica of dry process (anhydride silica), wet processes to prepare Silica (aqueous silicon dioxide) etc. be used as silica (B1-5).Particularly, the silica of wet process preparation is because of silicon The quantity of silane alcohol base it is more and it is preferred that.

The angle that the wearability generated improves, silica are improved and improved by reinforcing property from fuel economy (B1-5) N2 adsorption BET specific surface area (N₂SA) it is preferably not less than 50m²/ g, more preferably no less than 70m²/ g is not more preferably small In 100m²/ g, more preferably no less than 120m²/ g is further preferably not less than 150m²/g.On the other hand, from ensuring good point From the perspective of dissipating property and inhibiting agglutination, the N of silica (B1-5)₂SA is preferably no greater than 500m²/ g, preferably no greater than 400m²/ g, more preferably no more than 300m²/g。

The N of silica (B1-5)₂SA is the value measured according to ASTM D3037-81 by BET method.

Silica (B1-5) can be used alone particular types, or can be used in combination that its is two or more.

Unless contradicting with the purpose of the 5th embodiment, otherwise any filler common in the art can be appropriate Ground is used as the filler in addition to silica (B1-5), and the example of this filler includes carbon black (B2-5).By mixing charcoal Black (B2-5), can expect the improvement of wearability.Preferably comprise the filler of silica (B1-5) and carbon black (B2-5).

As carbon black (B2-5), for example, having the carbon black etc. produced by Audit For Process, and the two or more tools that can be used in combination There is the carbon black of different colloidal natures.Its example includes GPF, HAF, ISAF, SAF grade etc..

For the reasons why can obtaining good wet grip performance, dry grip performance and wearability, the nitrogen of carbon black (B2-5) Adsorption specific surface area (N₂It SA) is preferably 70~250m²/ g, more preferably 110~200m²/g.For the same reason, carbon black (B2-5) dibutyl phthalate oil absorption (DBP) is preferably 50~250ml/100g.It should be noted that carbon black (B2-5) N₂SA is the value measured according to JIS K6217-2:2001, and DPB is the value measured according to JIS K6217-4:2001.

Carbon black (B2-5) can be used alone particular types, or can be used in combination that its is two or more.

From the perspective of sufficient wet grip performance, relative to the rubber components (A-5) of 100 mass parts, silica (B1-5) combined amount is not less than 50 mass parts, more preferably no less than 60 mass parts.On the other hand, from its good dispersibility, And then good wearability from the perspective of, the combined amount be not more than 150 mass parts, preferably no greater than 120 mass parts, more preferably No more than 110 mass parts.

From the perspective of good wet grip performance, dry grip performance and wearability, at mixed carbon black (B2-5), phase For the rubber components (A-5) of 100 mass parts, the combined amount of carbon black is preferably not less than 5 mass parts, more preferably no less than 8 mass Part.On the other hand, from the perspective of keeping good wet grip performance, which is preferably no greater than 50 mass parts, more excellent Choosing is not more than 35 mass parts, is further preferably not more than 20 mass parts.

Rubber from the perspective of good wet grip performance, dry grip performance and wearability, relative to 100 mass parts Component (A-5), the combined amount of filler are preferably not less than 50 mass parts, preferably not less than 55 mass parts, more preferably no less than 65 matter Measure part.On the other hand, from the perspective of good wet grip performance and wearability, which is not more than 170 mass parts, more Preferably no greater than 150 mass parts are further preferably not more than 120 mass parts.From satisfactorily showing the 5th embodiment From the perspective of effect, silica (B1-5) ratio shared in whole fillers is preferably not less than 70 mass %, more preferably Not less than 75 mass %, more preferably no less than 80 mass %.On the other hand, based on reason same as described above, the ratio is little In 95 mass %, more preferably no more than 90 mass %.

When filler is made of silica (B1-5) and carbon black (B2-5), the combined amount of carbon black (B2-5) can be by above-mentioned " total amount of filler " and " combined amount of silica (B1-5) " determines, alternatively, the combined amount of silica (B1-5) can be by Above-mentioned " total amount of filler " and " combined amount of carbon black (B2-5) " determines.

< silane coupling agent (C-5) >

Silane coupling agent (C-5) is not particularly limited, and any silane coupling agent commonly used in the art can be suitably used.It is this The example of silane coupling agent (C-5) is: bis- (3- triethoxysilylpropyltetrasulfide) polysulfides, bis- (2- triethoxy first silicon Alkyl ethyl) polysulfide, bis- (3- trimethoxy-silylpropyl) polysulfides, bis- (2- trimethoxysilyl second Base) polysulfide, bis- (4- triethoxysilyl butyl) polysulfides, bis- (4- trimethoxysilyl butyl) more sulphur Compound etc..Wherein, preferably bis- (3- triethoxysilylpropyltetrasulfide) polysulfides and bis- (2- triethoxysilyl second Base) polysulfide, more preferable bis- (3- triethoxysilylpropyltetrasulfide) tetrasulfides and bis- (2- triethoxysilyl second Base) tetrasulfide.

From the angle of good wearability, relative to the silica (B1-5) of 100 mass parts, silane coupling agent (C-5) combined amount is preferably not less than 1 mass parts, more preferably no less than 1.5 mass parts, more preferably no less than 2 mass parts, preferably Not less than 5 mass parts, more preferably no less than 7 mass parts.On the other hand, from the angle for obtaining the improvement to match with increased costs From the point of view of degree, which is preferably more than 20 mass parts, more preferably no more than 15 mass parts, more preferably no more than 12 mass parts.

Silane coupling agent (C-5) can be used alone particular types, and also can be used in combination, its is two or more.

< organo-aluminum compound (D-5) >

Organo-aluminum compound (D-5) is the compound comprising aluminium and organic compound, and it is to generate hydrogen by hydrolysis The compound of aluminium oxide.Therefore, when mixing this organo-aluminum compound (D-5), at least one of organo-aluminum compound (D-5) Divide and hydrolyzed in kneading process, generates aluminium hydroxide.

The example of this organo-aluminum compound (D-5) includes the aluminium alcoholates indicated by formula (1):

Al(OR^a)(OR^b)(OR^c)₃ (1)

From the angle of good wet grip performance and wearability, relative to the rubber components (A-5) of 100 mass parts, The combined amount of organo-aluminum compound (D-5) is preferably not less than 5 mass parts, more preferably no less than 7 mass parts, more preferably no less than 10 Mass parts.On the other hand, for reason same as described above, which is preferably more than 45 mass parts, more preferably no more than 40 mass parts.

Organo-aluminum compound (D-5) can be used alone particular types, and also can be used in combination, its is two or more.

< alkalinity vulcanization accelerator (E-5) >

Vulcanization accelerator is that typically in the chemicals being added together with vulcanizing agent in the rear half stage (X2-2) of kneading step.But It is that one of the 5th embodiment is characterized in that, the specific vulcanization of mixing promotes in the first half stage (X1-2) of kneading step Agent.It by this specific vulcanization accelerator of mixing in the first half stage (X1-2) of kneading step, can expect: be walked mediating Rapid system is turned into alkalinity and silane coupling agent polycondensation reaction acceleration.

In one of the 5th embodiment, the specific vulcanization accelerator used in the first half stage (X1-2) of kneading step Example include: guanidine system vulcanization accelerator, aldehyde ammonia system vulcanization accelerator, aldehyde amine system vulcanization accelerator and thiocarbamide system vulcanization promote Agent.Herein, these vulcanization accelerators are referred to as " alkaline vulcanization accelerator (E-5) ", to be different from other vulcanization accelerators.At this In a little alkalinity vulcanization accelerators (E-5), guanidine system vulcanization accelerator due to have a vulcanization acceleration effect and it is preferred that.

The example of guanidine system vulcanization accelerator includes 1,3- diphenylguanidine, 1,3- di-o-tolylguanidine, 1- neighbour's toluene biguanides, two adjacent benzene The adjacent isopropylbenzene guanidine of di-o-tolylguanidine salt, 1,3- bis-, the adjacent diphenylguanidine of 1,3- bis-, the adjacent cumenyl -2- of 1,3- bis- of diphenol borate Propionyl guanidine etc..1,3- diphenylguanidine, 1,3- di-o-tolylguanidine and 1- neighbour's toluene biguanides due to high response and it is preferred that, 1,3- diphenylguanidine Since reactivity is higher and particularly preferred.

The example of aldehyde ammonia system vulcanization accelerator includes hexa etc..The example of aldehyde amine system vulcanization accelerator includes just Butyraldehyde aniline etc..The example of thiocarbamide system vulcanization accelerator includes N,N' diphenyl thiourea, trimethyl thiourea, N, N'- diethyl sulfide Urea etc..

Alkaline vulcanization accelerator (E-5) can be used alone one kind, and also can be used in combination, its is two or more.

Rubber components from the angle of the polycondensation reaction of activation silane coupling agent (C-5), relative to 100 mass parts (A-5), the combined amount of alkaline vulcanization accelerator (E-5) is preferably 0.5 mass parts, is more preferably not less than 1.0 mass parts, into one Step is preferably not less than 1.5 mass parts.On the other hand, from the perspective of never being produced bigger effect to rate of cure, the mixing Amount is preferably no greater than 3.5 mass parts, and more preferably no more than 3.0 mass parts are further preferably not more than 2.5 mass parts.

In the rubber composition according to one of the 5th embodiment, other than mixing said ingredients, also optionally Mix tire industry in common compounding agent, for example, softening agent, antioxidant, wax, stearic acid, zinc oxide, vulcanizing agent (such as Sulphur), vulcanization accelerator etc..

By mixing softening agent, can expect to improve wet grip performance, dry grip performance and initial stage grip performance etc..Softening Agent is not particularly limited, its example includes oil.The example of oil includes processing oil, such as paraffin series processing oil, aromatic system add Work oil and naphthene series processing oil.In miscella, from the perspective of obtaining the abundant effect by addition oil generation, relative to The rubber components (A-5) of 100 mass parts, oily combined amount are preferably not less than 20 mass parts, more preferably no less than 25 mass parts.Separately On the one hand, from the angle for keeping wearability, oily combined amount is preferably more than 70 mass parts, more preferably no more than 60 mass Part.It should be noted that oily content includes the oil mass for including in oil-extended rubber herein.

The example of vulcanization accelerator in addition to above-mentioned vulcanization accelerator includes: sulfenamide system, thiazole system and thiuram It is vulcanization accelerator.The example of the vulcanization accelerator of sulfenamide system includes N cyclohexyl 2 benzothiazole sulfenamide, N, N- Dicyclohexyl -2-[4-morpholinodithio sulfenamide, N tert butyl benzothiazole 2 sulfenamide etc..Thiazole system vulcanization accelerator Example includes 2-mercaptobenzothiazole, the cyclohexylamine salt of 2-mercaptobenzothiazole, two -2-[4-morpholinodithio based bisulfides etc..Autumn The example of blue nurse system vulcanization accelerator includes tetra methylthiuram list sulfide, tetra-benzyl thiram disulphide, four (2- ethyls Hexyl) thiuram disulfides etc..

Rubber when mixing such vulcanization accelerator, from the angle for realizing full cure, relative to 100 mass parts Glue component (A-5), the content of vulcanization accelerator are preferably not less than 1 mass parts, more preferably no less than 2 mass parts.On the other hand, from From the perspective of ensuring enough time of scorch, the content of the vulcanization accelerator is preferably more than 20 mass parts, does not surpass more preferably Cross 15 mass parts.

The vulcanization accelerator can be used alone particular types, and also can be used in combination, its is two or more.

The preparation method > of < rubber composition

In the preparation method according to the rubber composition of one of the 5th embodiment, kneading step included at least two stages, At least two stage includes mediating the first half stage (X1-2) of the feed chemicals without vulcanizing agent and obtaining to the first half stage The rear half stage (X2-2) of vulcanizing agent and kneaded mixture is added in the kneaded material obtained, also, the method is characterized in that, it is preceding Half stage, (X1-2) was such stage: alkaline vulcanization accelerator (E-5) is added to comprising rubber components (A-5), filler (B1-5), in the feed chemicals of silane coupling agent (C-5) and organo-aluminum compound (D-5), and the stage of kneaded mixture.It removes Except this feature, it can be prepared by a conventional method according to the rubber composition of one of the 5th embodiment.I.e., it is possible to pass through Above-mentioned each component, the side then vulcanized as needed are mediated with Banbury mixer, kneader or open roll mill etc. Method, or by other methods, to prepare rubber composition.

In one of the 5th embodiment, kneading step included at least two stages, and at least two stage includes pinching It closes the first half stage (X1-2) of the feed chemicals without vulcanizing agent and is added into the kneaded material of first half stage (X1-2) acquisition The rear half stage (terminal stage) (X2-2) of vulcanizing agent and kneaded mixture.In addition, as needed, the first half stage (X1-2) can be with It is further classified as multiple stages.Herein, vulcanizing agent is for so-called vulcanization (that is, rubber group of the crosslinking as plastic material Point polymer chain) chemicals, representative example is sulphur.

(the first half stage (X1-2) of kneading step)

More specifically, the first half stage (X1-2) of kneading step is following stages: mixing such as rubber components (A-5), filler (B1-5), the rank of silane coupling agent (C-5), organo-aluminum compound (D-5) and alkaline vulcanization accelerator (E-5) and kneaded mixture Section.In the first half stage, softening agent, stearic acid etc. can be also mixed.It does not include only mediating rubber components (A- in advance in the first half stage 5) stage.

Can be as needed, the first half stage (X1-2) of kneading step is divided into multiple stages, for example, by above-mentioned chemicals (A-5) kneading of~chemicals (E-5) etc. be divided into repeatedly periodically to be mediated in the case where.For example, by first half rank In the case that section (X1-2) is divided into two stages including first stage and terminal stage, the first stage can be kneading and include rubber The raw material of some or all of glue component (A-5), silica (B1-5) and some or all of silane coupling agent (C-5) The stage of product；And terminal stage can be such stage: in the kneaded material obtained to the first stage, mixing includes dioxy The feed chemicals of at least residue of any one in SiClx (B1-5) and silane coupling agent (C-5), then kneaded mixture Stage.In this case, alkaline vulcanization accelerator (E-5) can at least either phase in the first stage or in terminal stage Middle mixing.

In addition, the first half stage (X1-2) of kneading step can be divided into including the centre between first stage and terminal stage Three or more the stages in stage.Intermediate stage is such stage: being obtained to the previous stage in first stage or intermediate stage In kneaded material, raw material of the mixing comprising at least residue of any one in silica (B1-5) and silane coupling agent (C-5) The stage of chemicals.In this case, alkaline vulcanization accelerator (E-5) can from the first stage into terminal stage at least It is mixed in either phase.

Other than above-mentioned item, first half stage (X1-2) of kneading step can be according to generalling use in rubber industry Conventional method carries out.

In the first half stage (X1-2) of kneading step, from satisfactorily carrying out above-mentioned hydrolysis and polycondensation reaction From the point of view of angle, the discharge temperature of kneaded material is generally preferably not less than 150 DEG C, more desirably not less than 155 DEG C.On the other hand, from anti- Only rubber internal gelation and from the perspective of ensuring good workability, the discharge temperature are generally preferably not higher than 180 DEG C, more excellent Choosing is not higher than 175 DEG C.It is mediated as long as sufficiently realizing, kneading time is not particularly limited, and in addition kneading time is not generally preferably Less than 10 seconds, more preferably no less than 30 seconds, more preferably no less than 60 seconds.On the other hand, which is generally preferably no more than 20 minutes, more preferably no more than 10 minutes.These discharge temperatures and kneading time can be according to by dividing first half stage shape At stage how much, and changed according to type and quantity for the chemicals to be mixed in each stage etc..Art technology Personnel can suitably determine best discharge temperature and kneading time in each condition.

(rear half stage (X2-2) of kneading step)

The rear half stage (X2-2) of kneading step is the terminal stage of such kneading step: by vulcanizing agent and other remaining chemistry Product are mixed into the kneaded material obtained in first half kneading step, and the terminal stage of the kneading step of kneaded mixture.It mediates The rear half stage of step can be carried out according to the conventional method generallyd use in rubber industry.

< application >

Its characteristic can be made full use of according to the rubber composition of one of the 5th embodiment, is used for various applications, wherein can be with As rubber composition for tire.The rubber composition according to one of the 5th embodiment is being used to combine as tyre rubber When object, it can be used for constituting the various components of tire, for example, for tyre surface, liner layer, sidewall including tread base Deng, also, according to its characteristic, it is preferred for tyre surface (tire tread).

When being used for tire according to the rubber composition of one of the 5th embodiment, tire can be by conventional method by root It is prepared according to the rubber composition of one of the 5th embodiment.That is, by that mixing said ingredients will obtain as suitably desired Mixture mediate, kneaded material is squeezed out in the unvulcanized stage and is processed into the shape of each structural tire part, and passes through conventional molding side Method forms on tyre building machine, to form unvulcanized tire.Can by the way that the unvulcanized tire is heated in vulcanizer and Compression, to produce tire, and by the way that air to be added in tire, can produce pneumatic tire.

Although not intended to it is bound by theory in any way, it is believed that replacing hydrogen using organo-aluminum compound (D-5) The effect of aluminium oxide is as follows.That is, although aluminium hydroxide helps to improve wet grip performance, since its partial size is relatively large And it does not have the binding site with rubber, therefore aluminium hydroxide inevitably reduces wearability.By making partial size become smaller, It can expect improve wearability to a certain extent.On the other hand, there are problems that the improvement space reduction of wet grip performance.So And organo-aluminum compound (D-5) is the compound that aluminium hydroxide is generated by hydrolysis, hydrolysis method is similar to silane coupling agent (C-5) hydrolysis method.Therefore, it cooperates with silane coupling agent (C-5), efficiently consumes the moisture in filler surface, and When mediating, shear strength becomes larger.As a result, thinking to mediate the sufficiently dispersibility of progress and filler is improved.In addition, recognizing For organo-aluminum compound (D-5) by with silane coupling agent (C-5) react identical in a manner of reacted with rubber, to enhance reinforcement rubber The effect of glue, so as to improve wearability.

In addition, passing through the mixed-alkali sulphur in the first half stage (X1-2) of kneading step in one of the 5th embodiment Change promotor, can expect the available maintenance of effect and supplement generated by the mixing of organo-aluminum compound (D-5).That is, having The reactivity of machine aluminium compound (D-5) and water is high, is easier to be hydrolyzed, and generate above-mentioned desired effects, however there are silane The worry of the polycondensation reaction delay of coupling agent (C-5).Therefore, pass through the mixed-alkali in the first half stage (X1-2) of kneading step Vulcanization accelerator (E-5), can expect the acceleration of the polycondensation reaction.

Embodiment

Hereinafter, explaining the present invention by embodiment, but the present invention is not limited to these Examples.

It is explained below various chemicals used herein.As needed, various chemicals are carried out by conventional method Purification.

< is used to prepare the various chemicals > of rubber composition

S-SBR: BUNA VSL 2525-0 (SBR of polymerisation in solution, the styrene amount of bonding: 25 matter purchased from Lang Sheng Japanese firm % is measured, contents of ethylene: 25 moles of %, Tg=-49 DEG C)

Silica A: ULTRASIL VN3 (the CTAB specific surface area: 165m purchased from Evonik Degussa Corp.²/g)(N₂SA: 175m²/g)

Silica B: Zeosil HRS1200MP (the CTAB specific surface area: 195m of Japanese Co., Ltd is tieed up purchased from Sol²/g) (N₂SA:200m²/g)

Silica C: Zeosil Premium200MP (the CTAB specific surface area: 200m of Japanese Co., Ltd is tieed up purchased from Sol²/ g)(N₂SA:220m²/g)

Silica D: Zeosil 1115MP (the CTAB specific surface area: 105m of Japanese Co., Ltd is tieed up purchased from Sol²/g) (N₂SA:115m²/g)

Carbon black: the N220 (N purchased from Mitsubishi chemical Co., Ltd₂SA:114m²/g)

Aluminium hydroxide: the Higilite H-43 (trade name) (average primary particle diameter: 0.75 μm) purchased from Showa Denko K. K

Organo-aluminum compound: aluminium isopropoxide (compound name) PADM (trade name) purchased from Chuan Yan fine chemistry industry Co., Ltd.

Oil: the TDAE purchased from lucky female (JX) Kuang stone Energy KK

Silane coupling A: the Si69 (bis- (3- triethoxysilylpropyltetrasulfide) tetrasulfides) purchased from Evonik Degussa Corp.

Silane coupling agent B: NXT Silane (the 3- Octanoylthio propyl-triethoxysilicane purchased from MomentivePerformanceMaterials Alkane)

Silane coupling agent C: (copolymer of connection unit A and connection unit B are (even by the NXT-Z45 purchased from MomentivePerformanceMaterials A:55 moles of % of order member, B1-45 moles of % of connection unit)

Antioxidant: NOCRAC 6C (N- phenyl-N'- (the 1,3- dimethyl butyrate purchased from Ouchi Shinko Chemical Ind Co., Ltd. Base)-p-phenylenediamine) (6PPD)

Wax: the Ozoace 0355 purchased from Japan Sekiscoat Co., Ltd.

Stearic acid: the pearl stearic acid " Chinese toon (TSUBAKI) " purchased from Japan Oil Co

Zinc oxide: the zinc oxide #2 (zinc oxide 2) purchased from Mitsu Mining & Smelting Co., Ltd

Vulcanization accelerator A: the Nocceler NS purchased from Ouchi Shinko Chemical Ind Co., Ltd.

Vulcanization accelerator B: Nocceler CZ (the N- cyclohexyl -2-[4-morpholinodithio purchased from Ouchi Shinko Chemical Ind Co., Ltd. Base sulfenamide: CBS).

Alkaline vulcanization accelerator: the Nocceler D (1,3- diphenylguanidine: DPG) purchased from Ouchi Shinko Chemical Ind Co., Ltd.

Sulphur: the powder sulphur of He Jian chemical industry Co., Ltd. manufacture

< first embodiment >

1~embodiment of embodiment related with first embodiment described below 3 and 1~comparative example of comparative example 5.

The preparation > of < rubber composition for tire

It is formulated according to shown in table 1, using 1.7 liters of Banbury mixers as manufactured by (Co., Ltd.) Kobe Steel, will remove Material other than sulphur and vulcanization accelerator is mediated 5 minutes under conditions of 150 DEG C, obtains kneaded material.Then, sulphur and vulcanization are promoted It is added in resulting kneaded material into agent A, and is obtained kneaded mixture 5 minutes under conditions of 80 DEG C using open roll mill Obtain unvulcanized rubber composition.Obtained unvulcanized rubber composition is added under conditions of 170 DEG C with the metal die of 2mm thickness Pressure vulcanization 20 minutes, obtains vulcanized rubber composition.Obtained unvulcanized rubber composition is shaped to the shape of tyre surface, is being taken turns Profile (extrudate) and other structural tire parts are laminated on tyre forming machine, unvulcanized tire is formed, then in 170 DEG C of item Vulcanize 12 minutes under part, production test tire (tire size: 195/65R15).

< evaluates >

(wet to grab ground index)

According to the well known measurement method for the dynamic friction test machine (D.F.Tester) for using Bang industry companies to manufacture, from above-mentioned Test film is cut out in obtained vulcanized rubber composition, is sprayed water to the test film, it is ensured that water can be formed on test film top Film, and while the linear velocity of test film is increased to 7km/h, it measures dynamic friction coefficient (μ).If wet with reference to comparative example is grabbed Ground index is 100, and each dynamic friction coefficient (μ) being respectively formulated is obtained by following equation and uses exponential representation.Dynamic friction coefficient (μ) It is bigger, it is wet grab ground index it is bigger, then the safety in wet grip performance and driving process is higher.

(wet to grab ground index)=(μ being respectively formulated) ÷ (with reference to the μ of comparative example) × 100

(fuel economy sex index)

Test film is cut out from each vulcanized rubber composition, the viscoelastic spectrometer manufactured using upper island production Co., Ltd. of institute, Under the frequency of 10% initial strain, 1% dynamic strain and 10Hz, loss angle of each vulcanized rubber piece at 70 DEG C is being measured just Cut (tan δ).If the fuel economy sex index with reference to comparative example is 100, the tan δ being respectively formulated, which is obtained and used by following equation, to be referred to Number indicates.Tan δ value is lower, and fuel economy sex index is bigger, then fuel economy is more excellent.

(fuel economy sex index)=(with reference to the tan δ of comparative example) ÷ (the tan δ being respectively formulated) × 100

(rubber rupture strength index)

According to JIS K6251, using No.3 dumbbell shape test film, tension test is carried out to resulting vulcanized rubber composition, with Measure fracture tensile strength (TB) and elongation at break (EB) (%).Also, TB × EB1-2 value is confirmed as breaking strength.If Rupture strength index with reference to comparative example is 100, and the breaking strength being respectively formulated is obtained by following equatioies and uses exponential representation.Refer to Number is bigger, then breaking strength is more excellent.

(rupture strength index)=(TB × EB1-2 being respectively formulated)/(with reference to TB × EB1-2 of comparative example) × 100

(abrasion resistance index)

Using blue Berne (Lambourn) abrasiometer, room temperature, the load of 1.0kgf and 30% slip rate under conditions of, Measure the abrasion loss (wear loss) of vulcanized rubber composition.If the abrasion resistance index with reference to comparative example is 100, the mill being respectively formulated Consumption is obtained by following equatioies and uses exponential representation.Abrasion loss is smaller, and abrasion resistance index is bigger, then wearability is more excellent.

(abrasion resistance index)=(with reference to the abrasion loss of comparative example)/(abrasion loss being respectively formulated) × 100

(result)

The results are shown in Table 1.

Table 1

< second embodiment >

4~embodiment of embodiment related with second embodiment described below 10 and 6~comparative example of comparative example 8.

The preparation > of < rubber composition for tire

It is formulated according to shown in table 2, using 1.7 liters of Banbury mixers as manufactured by (Co., Ltd.) Kobe Steel, will remove Material other than sulphur and vulcanization accelerator is mediated 5 minutes under conditions of 150 DEG C, obtains kneaded material.Then, sulphur and vulcanization are promoted It is added in resulting kneaded material into agent A, and is obtained kneaded mixture 5 minutes under conditions of 80 DEG C using open roll mill Obtain unvulcanized rubber composition.Obtained unvulcanized rubber composition is added under conditions of 170 DEG C with the metal die of 2mm thickness Pressure vulcanization 20 minutes, obtains vulcanized rubber composition.Obtained unvulcanized rubber composition is shaped to the shape of tyre surface, is being taken turns Profile and other structural tire parts are laminated on tyre forming machine, form unvulcanized tire, then vulcanizes 12 points under conditions of 170 DEG C Clock, production test tire (tire size: 195/65R15).

< evaluates >

(wet to grab ground index)

According to the well known measurement method for the dynamic friction test machine (D.F.Tester) for using Bang industry companies to manufacture, from above-mentioned Test film is cut out in obtained vulcanized rubber composition, is sprayed water to the test film, it is ensured that can be formed on the test film top Moisture film, and while the linear velocity of the test film is increased to 7km/h, it measures dynamic friction coefficient (μ).If with reference to comparative example Wet ground index of grabbing is 100, and each dynamic friction coefficient (μ) being respectively formulated is obtained by following equation and uses exponential representation.Dynamic friction system Number (μ) it is bigger, it is wet grab ground index it is bigger, then the safety in wet grip performance and driving process is higher.

(fuel economy sex index)

Test film is cut out from each vulcanized rubber composition, the viscoelastic spectrometer manufactured using upper island production Co., Ltd. of institute, Under the frequency of 10% initial strain, 1% dynamic strain and 10Hz, loss angle of each vulcanized rubber piece at 70 DEG C is being measured just Cut (tan δ).If the fuel economy sex index with reference to comparative example is 100, the tan δ being respectively formulated, which is obtained and used by following equatioies, to be referred to Number indicates.Tan δ value is lower, and fuel economy sex index is bigger, then fuel economy is more excellent.

(rubber rupture strength index)

(abrasion resistance index)

(result)

The results are shown in Table 2.

Table 2

< third embodiment >

11~embodiment of embodiment related with third embodiment described below 13 and 9~comparative example of comparative example 17.

The preparation > of < rubber composition for tire

It is formulated according to shown in table 3, using 1.7 liters of Banbury mixers as manufactured by (Co., Ltd.) Kobe Steel, will remove Material other than sulphur and vulcanization accelerator is mediated 5 minutes under conditions of 150 DEG C, obtains kneaded material.Then, sulphur and vulcanization are promoted It is added in resulting kneaded material into agent A, and is obtained kneaded mixture 5 minutes under conditions of 80 DEG C using open roll mill Obtain unvulcanized rubber composition.Obtained unvulcanized rubber composition is added under conditions of 170 DEG C with the metal die of 2mm thickness Pressure vulcanization 20 minutes, obtains vulcanized rubber composition.Obtained unvulcanized rubber composition is shaped to the shape of tyre surface, is being taken turns Profile and other structural tire parts are laminated on tyre forming machine, form unvulcanized tire, then vulcanizes 12 points under conditions of 170 DEG C Clock, production test tire (tire size: 195/65R15).

< evaluates >

(the unreacted activity index (unreacted rate index) of coupling agent)

Unvulcanized rubber composition is cut into slices, these pieces are extracted 24 hours in ethanol.With gas Chromatographic Determination extract liquor The amount of the unreacted coupling agent of middle extraction is calculated the ratio (quality %) of unreacted coupling agent by the combined amount of coupling agent. If the unreacted activity index with reference to the coupling agent of comparative example is 100, the unreacted activity index for the coupling agent being respectively formulated passes through Following equatioies obtain and use exponential representation.The ratio of unreacted coupling agent is smaller, and the unreacted activity index of coupling agent is smaller, Then this means that the amount for the unreacted coupling agent being present in unvulcanized rubber composition after kneading step termination is smaller. I.e., it means that a large amount of coupling agent reacts in kneading step, this is satisfactory.

(the unreacted activity index of coupling agent)=(ratio of the amount for the unreacted coupling agent being respectively formulated) ÷ (refers to comparative example Unreacted coupling agent amount ratio) × 100

(wet to grab ground index)

(fuel economy sex index)

(rubber rupture strength index)

(abrasion resistance index)

(result)

The results are shown in Table 3.

Table 3

The 4th embodiment > of <

14~embodiment of embodiment 17 related with the 4th embodiment described below and 18~comparative example of comparative example 21.

The preparation > of < rubber composition for tire

(step I (the first half stage of kneading step))

It is formulated according to shown in table 4, it is real using 1.7 liters of Banbury mixers as manufactured by (Co., Ltd.) Kobe Steel Kneading 5 minutes is applied, then the scheduled discharge temperature shown in table 4 and kneaded material is kept under the scheduled retention time, then arranges Out, kneaded material is obtained.

(step II (rear half stage of kneading step))

Then, it is formulated, each chemicals is added in resulting kneaded material, then with open roll milling according to shown in table 4 Machine is mediated 5 minutes under conditions of 80 DEG C, obtains unvulcanized rubber composition.

(vulcanisation step)

Obtained unvulcanized rubber composition is vulcanized 20 minutes under conditions of 170 DEG C, obtains vulcanized rubber composition.

< evaluates >

(processability)

In 8 inches of open roll mill, by the unvulcanized rubber composition of 1kg with the thickness of the width of 20cm and 4mm volume Around, and mediate until the temperature of unvulcanized rubber composition reaches 50 ± 10 DEG C.Then unvulcanized rubber composition is cut It is cut into sheet rubber, visually observes the surface roughness of rubber composition, surface roughness is evaluated with following standard.

Zero: surface is smooth, and edge is also smooth.

△: rough surface, edge heaving of the sea (can be shaped to sheet material).

×: rough surface is serious and is difficult to be shaped to sheet material.

(wet to grab ground index)

Test film is cut out from each vulcanized rubber composition, the viscoelastic spectrometer manufactured using upper island production Co., Ltd. of institute, Under the frequency of 10% initial strain, 0.1% dynamic strain and 10Hz, loss angle of each vulcanized rubber piece at 0 DEG C is measured Tangent (low temperature tan δ).If the wet ground index of grabbing with reference to comparative example is 100, the tan δ being respectively formulated is used in combination by following equatioies Exponential representation.Low temperature tan δ value is higher, it is wet grab ground index it is bigger, then wet grip performance is more excellent, and driving safety is higher.

(wet to grab ground index)=(the tan δ being respectively formulated)/(with reference to tan δ of comparative example) × 100

(fuel economy sex index)

Test film is cut out from each vulcanized rubber composition, the viscoelastic spectrometer manufactured using upper island production Co., Ltd. of institute, Under the frequency of 10% initial strain, 1% dynamic strain and 10Hz, loss angle of each vulcanized rubber piece at 70 DEG C is being measured just Cut (high temperature tan δ).If the fuel economy sex index with reference to comparative example is 100, the tan δ being respectively formulated is obtained simultaneously by following equatioies Use exponential representation.High temperature tan δ value is lower, and fuel economy sex index is bigger, then fuel economy is more excellent.

(fuel economy sex index)=(with reference to the tan δ of comparative example)/(the tan δ being respectively formulated) × 100

(abrasion resistance index)

Using blue Berne (Lambourn) abrasiometer, room temperature, the load of 1.0kgf and 30% slip rate under conditions of, Measure the abrasion loss (wear loss) of each vulcanized rubber composition.If the abrasion resistance index with reference to comparative example is 100, respectively it is formulated Abrasion loss is obtained by following equatioies and uses exponential representation.Abrasion loss is smaller, and abrasion resistance index is bigger, then wearability is more excellent.

(result)

The results are shown in Table 4.

Table 4

The 5th embodiment > of <

18~embodiment of embodiment 20 related with the 5th embodiment described below and comparative example 22.

The preparation > of < rubber composition for tire

(first stage in the first half stage of kneading step)

It is formulated according to shown in table 5, using 1.7 liters of Banbury mixers as manufactured by (Co., Ltd.) Kobe Steel, 160 DEG C discharge temperature under mediate 5 minutes, obtain kneaded material.In table 5, the first stage about the first half stage in kneading step The alkaline vulcanization accelerator of investment, " first half investment " refers to throws alkaline vulcanization accelerator together with filler and organo-aluminum compound Enter.On the other hand, " later half investment " refers to that electrical power (electric power) reaches first peak after investment filler and organo-aluminum compound Alkaline vulcanization accelerator is put into later.In kneading step, electrical power-time graph usually after investment rubber components and filler There are two peaks for tool, and first peak is first peak in two peaks.

(second stage in the first half stage of kneading step)

Then, it is formulated according to shown in table 5, each chemicals is added in resulting kneaded material, is then used by (strain formula meeting Society) 1.7 liters of Banbury mixers manufactured by Kobe Steel, it is mediated 4 minutes under 150 DEG C of discharge temperature, obtains kneaded material.

(rear half stage of kneading step)

Then, it is formulated according to shown in table 5, each chemicals is added in resulting kneaded material, then use open roller Mill is mediated 5 minutes under conditions of 80 DEG C, obtains unvulcanized rubber composition.

(vulcanisation step)

< evaluates >

(wet to grab ground index)

Test film is cut out from each vulcanized rubber composition, the viscoelastic spectrometer manufactured using upper island production Co., Ltd. of institute, Under the frequency of 10% initial strain, 0.1% dynamic strain and 10Hz, loss angle of each vulcanized rubber piece at 0 DEG C is measured Tangent (low temperature tan δ).If the wet ground index of grabbing with reference to comparative example is 100, the tan δ being respectively formulated is used in combination by following equatioies Exponential representation.Low temperature tan δ value is higher, it is wet grab ground index it is bigger, then wet grip performance and driving safety are higher.

(fuel economy sex index)

(abrasion resistance index)

(result)

The results are shown in Table 5.

Table 5

Claims

1. a kind of rubber composition, it includes feed chemicals, the feed chemicals contain SBR styrene butadiene rubbers Rubber components, the filler containing silica, silane coupling agent and organo-aluminum compound.

2. rubber composition according to claim 1, wherein the silane coupling agent is have sulfydryl silane coupled Agent, and the silane coupling agent is selected from and includes the connection unit A indicated by lower formula (I) and the connection list indicated by lower formula (II) The silane coupling agent of first B and at least one of the silane coupling agent indicated by lower formula (III),

In formula,

X is 0 or more integer, and y is 1 or more integer,

R¹Indicate hydrogen, halogen, branch or the unbranched alkyl with 1~30 carbon atom, branch or it is unbranched with 2~ Alkenyl, branch or the unbranched alkynyl with 2~30 carbon atoms of 30 carbon atoms or the end hydrogen of the alkyl are by hydroxyl The alkyl that base or carboxyl replace；R²Indicate branch or the unbranched alkylidene with 1~30 carbon atom, branch or unbranched Alkenylene with 2~30 carbon atoms or branch or the unbranched alkynylene with 2~30 carbon atoms；R¹And R²It can Cyclic structure is formed,

In formula,

R¹⁰⁰¹For selected from-Cl ,-Br ,-OR¹⁰⁰⁶,-O (O=) CR¹⁰⁰⁶,-ON=CR¹⁰⁰⁶R¹⁰⁰⁷,-ON=CR¹⁰⁰⁶R¹⁰⁰⁷、- NR¹⁰⁰⁶R¹⁰⁰⁷(OSiR¹⁰⁰⁶R¹⁰⁰⁷)_h(OSiR¹⁰⁰⁶R¹⁰⁰⁷R¹⁰⁰⁸) univalent perssad, wherein R¹⁰⁰⁶、R¹⁰⁰⁷And R¹⁰⁰⁸Can it is identical or Difference, respectively hydrogen atom or the monovalent hydrocarbon with 1~18 carbon atom, the average value of h are 1~4,

R¹⁰⁰²For R¹⁰⁰¹, hydrogen atom or the monovalent hydrocarbon with 1~18 carbon atom,

R¹⁰⁰³For R¹⁰⁰¹、R¹⁰⁰², hydrogen atom or [O (R¹⁰⁰⁹O)_j]_0.5Group, wherein R¹⁰⁰⁹For the Asia with 1~18 carbon atom Alkyl, the integer that j is 1~4,

R¹⁰⁰⁴For the bivalent hydrocarbon radical with 1~18 carbon atom,

R¹⁰⁰⁵For the monovalent hydrocarbon with 1~18 carbon atom,

3. rubber composition according to claim 1, wherein the CTAB specific surface area of silica is 100m²/ g or more, And silica is 110m according to the BET specific surface area of N2 adsorption²/ g or more.

4. rubber composition according to claim 3, wherein the CTAB specific surface area of silica is 180m²/ g or more, And silica is 185m according to the BET specific surface area of N2 adsorption²/ g or more.

5. rubber composition according to any one of claims 1 to 4, wherein the filler also includes carbon black.

6. rubber composition according to claim 5, wherein relative to the rubber components of 100 mass parts, silica Combined amount is 50~150 mass parts, and the combined amount of carbon black is 5~50 mass parts, and the combined amount of organo-aluminum compound is 5~45 matter Measure part；Relative to the silica of 100 mass parts, the combined amount of silane coupling agent is 1~20 mass parts.

7. rubber composition described according to claim 1~any one of 6, wherein the organo-aluminum compound is formula (1) institute The aluminium alcoholates shown:

Al(OR^a)(OR^b)(OR^c)₃ (1)

In formula, R^a、R^bAnd R^cSeparately indicate aliphatic alkyl.

8. a kind of tire tread is made using rubber composition described in any one of claim 1~7.

9. a kind of tire, with tire tread according to any one of claims 8.

10. a kind of preparation method of rubber composition, the rubber composition includes feed chemicals, the feed chemicals packet Containing the rubber components containing SBR styrene butadiene rubbers, the filler containing silica, silane coupling agent and organo-aluminium chemical combination Object, the method includes kneading step,

The kneading step included at least two stages, and at least two stage includes mediating the raw material for being free of sulfur vulcanization chemistries product The later half rank of sulfur vulcanization chemistries product and kneaded mixture is added in the first half stage of chemicals and the kneaded material obtained to the first half stage Section,

Wherein, in the first half stage, the discharge temperature of kneaded material is within the scope of predetermined temperature, and by kneaded material in the discharge At a temperature of keep predetermined period of time, to remove the alcohol that generates in kneading process.

11. a kind of preparation method of rubber composition, the rubber composition includes feed chemicals, the feed chemicals packet Containing the rubber components containing SBR styrene butadiene rubbers, the filler containing silica, silane coupling agent and organo-aluminium chemical combination Object, the method includes kneading step,